Xiaomi Robot Vacuum S40 ProFrom real comments

Name: Xiaomi Robot Vacuum S40 Pro
Rating: 3 (10 reviews)

Verdict distilled from 10 mentions across 10 aspects in comments under product review videos.

Positive sentiment50%

PROS 50%

CONS 50%

Rank based on 10 mentions across 10 aspects

View the verdict as

Buy this if...

You want a robot that saves significant daily vacuuming time
You want freedom to move the robot between floors without a bulky base station
You value long battery life over top-tier mopping performance

What users love

Significant Time Savings0 mentions

Strongly positive

Strong Vacuuming Performance0 mentions

Strongly positive

Amazing Battery Life0 mentions

Strongly positive

Multi-Floor Freedom Without a Base Station0 mentions

Widely praised

Expandable Mop and Brush Design0 mentions

Widely praised

Skip this if...

You need consistently strong, reliable mopping performance
Your floors are often cluttered with cables, chairs, or clutter
You want to avoid the risk of lidar sensor errors on arrival

What users complain about

Mopping Only Adequate0 mentions

Generally negative

Struggles With Cluttered Floors0 mentions

Generally negative

Lidar Sensor Errors on Some Units0 mentions

Frequently criticized

Inconsistent Mop Wetness0 mentions

Generally negative

Main Brush Becomes Soaked After Mopping0 mentions

Generally negative

Compare in seconds

Based on user comments

Best choice

Eufy RoboVac 11S MAX

Effective pet hair pickupGood customer serviceLong-term durabilityBattery may need eventual replacementVery low furniture may need adjustment

Eufy RoboVac 11S MAX

Effective pet hair pickup

Good customer service

Long-term durability

Battery may need eventual replacement

Very low furniture may need adjustment

Best value

2Budget

Eufy RoboVac 35C

Great value for the priceReliable auto-return to dockStrong pet hair and general suctionGets stuck on cordsGeneral quality concernsRemote control issues

Eufy RoboVac 35C

Great value for the price

Reliable auto-return to dock

Strong pet hair and general suction

Gets stuck on cords

General quality concerns

Remote control issues

You are here

Xiaomi Robot Vacuum S40 Pro

Amazing Battery LifeExpandable Mop and Brush DesignMulti-Floor Freedom Without a Base StationInconsistent Mop WetnessLidar Sensor Errors on Some UnitsMain Brush Becomes Soaked After Mopping

Xiaomi Robot Vacuum S40 Pro

Amazing Battery Life

Expandable Mop and Brush Design

Multi-Floor Freedom Without a Base Station

Inconsistent Mop Wetness

Lidar Sensor Errors on Some Units

Main Brush Becomes Soaked After Mopping

Eufy RoboVac L35 Hybrid

Strong hard floor cleaningEffective pet hair pickupGood suction and batteryStruggles on carpet and rugsDeclining cleaning performance over timeManual mop head installation required

Eufy RoboVac L35 Hybrid

Strong hard floor cleaning

Effective pet hair pickup

Good suction and battery

Struggles on carpet and rugs

Declining cleaning performance over time

Manual mop head installation required

5Budget

Eufy RoboVac 15C

Life-changing for mobility-limited usersEasy setup and clear status indicatorsGreat value for the priceCharging and docking faultsNo mapping technologyDock placement sensitivity

Eufy RoboVac 15C

Life-changing for mobility-limited users

Easy setup and clear status indicators

Great value for the price

Charging and docking faults

No mapping technology

Dock placement sensitivity

6Premium

Samsung Bespoke Jet Bot Steam Ultra

Packed with featuresSmart liquid and carpet detectionAI mapping plus steam mopping comboHigh pricePrivacy and camera security concernsLIDAR tower and clearance design issues

Samsung Bespoke Jet Bot Steam Ultra

Packed with features

Smart liquid and carpet detection

AI mapping plus steam mopping combo

High price

Privacy and camera security concerns

LIDAR tower and clearance design issues

Samsung Navibot

Pioneering self-emptying binAttractive, cute designNo bags neededPoor brush placementWeaker cleaning performanceNoise issues

Samsung Navibot

Pioneering self-emptying bin

Attractive, cute design

No bags needed

Poor brush placement

Weaker cleaning performance

Noise issues

8Premium

Eufy Omni S2

Edge and corner mopping reachStrong vacuuming powerMulti-cyclonic filtration benefits allergy sufferersDesign and maintenance annoyancesInconsistent wall-following navigationReliability and defect complaints

Eufy Omni S2

Edge and corner mopping reach

Strong vacuuming power

Multi-cyclonic filtration benefits allergy sufferers

Design and maintenance annoyances

Inconsistent wall-following navigation

Reliability and defect complaints

9Premium

Eufy Omni S1 Pro

Excellent hard floor cleaningStrong mopping with ozone self-cleaningGreat navigation and obstacle avoidanceError codes and defective unitsMediocre carpet cleaningLong hair tangling in roller

Eufy Omni S1 Pro

Excellent hard floor cleaning

Strong mopping with ozone self-cleaning

Great navigation and obstacle avoidance

Error codes and defective units

Mediocre carpet cleaning

Long hair tangling in roller

10Premium

Dreame L10 Ultra

Detergent-Compatible Mopping TankStrong Value When On SaleFront Wheel Assembly FailureHigh Full Retail Price

Dreame L10 Ultra

Detergent-Compatible Mopping Tank

Strong Value When On Sale

Front Wheel Assembly Failure

High Full Retail Price

Navigation
1. Eufy Omni S1 Proarrow_upward5
2. Samsung Navibotarrow_downward1
Navigation issues
1. Samsung Bespoke Jet Bot Steam Ultraarrow_downward1
2. Eufy Omni S2arrow_downward4
Pet hair pickup
1. Eufy RoboVac 11S MAXarrow_upward1
2. Eufy RoboVac 15Carrow_upward1
Quiet
1. Eufy Omni S2arrow_upward1
2. Eufy RoboVac 15Carrow_upward1

Overall Impression

Vacuuming performance and battery life stand out as the S40 Pro's strongest traits. One long-term user running two units in a bed and breakfast reports the robot saves at least two hours a day, calling the vacuuming great and the battery life amazing. This suggests the core suction and autonomy hold up well under repeated daily use, even in a commercial-style setting, making it a strong time-saver for routine cleaning tasks.

Not having a large base station gives it unusual flexibility between floors. A user highlights that the S40 Pro can be freely moved between floors, something base-station robots struggle with since their small water tanks make mopping upstairs impractical without relocating the heavy station. This portability is framed as a genuine advantage over competitors that lock users into one-floor operation via their docking hardware.

Mopping reliability and quality control raise some concerns. While one user calls mopping good but not great, others report inconsistent results: mopping stopped producing moisture even at level 3 on a second use, and the main roller brush ended up soaked after mop mode. A separate buyer received a unit with a lidar sensor error, suspecting a defective device, meaning experiences may vary by unit.

Outdated / Not-accurate data?

scheduleSignificant Time Savings

1 mentions

Strongly positive

A user running two units in a bed and breakfast reports saving at least 2 hours a day on cleaning, though occasional manual mopping and attention to corners is still needed.

@LorenzoBlade

I bought 2 for my bed and breakfast and it's saving me at least 2h a day of course you still need to mop at least ones in a wile yourself and to check the hard to reach corners. \nBut since I have it vaccuming is great washing is good not bad but not great but still helps a lot. \nBattery life is amazing. \nObject avoidance if you have a lot of clutter on the floor no robot will manage to clean properly I always remove chairs cables ecc before cleaning.\nOne other feature that beats robots with base stations you can freely move it btw floors, on the other hand the ones with stations have a very small water tank make it impossible to wash upstairs without moving the heavy station.

smart_display

March 21, 2026

cleaning_servicesStrong Vacuuming Performance

1 mentions

Strongly positive

The same long-term user describes the vacuuming itself as great, distinguishing it from the merely adequate mopping performance.

@LorenzoBlade

smart_display

March 21, 2026

battery_fullAmazing Battery Life

1 mentions

Strongly positive

Battery life is specifically called amazing by a daily user running two units, suggesting strong runtime for repeated cleaning sessions.

@LorenzoBlade

smart_display

March 21, 2026

swap_horizMulti-Floor Freedom Without a Base Station

1 mentions

Widely praised

Because it lacks a large base station, the robot can be freely moved between floors, an advantage over base-station robots whose small water tanks make upstairs mopping difficult without relocating the heavy dock.

@LorenzoBlade

smart_display

March 21, 2026

buildExpandable Mop and Brush Design

1 mentions

Widely praised

A prospective buyer comparing it to a competitor specifically liked the expandable mops and brushes of the S40 Pro as a design feature.

@zoomingjapan

Thank you. This was super helpful. I'm currently also struggling to decide whether to get the S40 Pro or the Dreame L10 Pro gen3.... my main issue are many long hair. Which one handled that better? I also like the expandable mops and brushes of the S40 Pro, but am a bit worried about navigation of the Xiaomi.

smart_display

February 19, 2026

water_dropMopping Only Adequate

1 mentions

Generally negative

A daily user describes the washing/mopping as good but not great, saying it still helps a lot but requires occasional manual mopping to fully finish the job.

@LorenzoBlade

smart_display

March 21, 2026

warningStruggles With Cluttered Floors

1 mentions

Generally negative

The same user notes that no robot, including this one, manages to clean properly with a lot of clutter on the floor, requiring chairs and cables to be removed beforehand.

@LorenzoBlade

smart_display

March 21, 2026

sensorsLidar Sensor Errors on Some Units

1 mentions

Frequently criticized

A buyer received a lidar sensor error shortly after purchase and suspected the unit was defective, planning to return it and try another.

@felipedias9352

Thank you for the review, it is great! I have the same issue you had, bought the robot and got the lidar sensor error, so I think it's deffetive and gonna return it. But I liked it so I will try again and get another one, I just hope it's good like happened to you 😅

smart_display

May 3, 2026

opacityInconsistent Mop Wetness

1 mentions

Generally negative

A user reports that mopping worked well on level 3 the first time, but on a second use there was no moisture at all even at the same setting.

@Emreu07

When I first used it, it mopped very well on level 3. But now, on my second use, it doesn’t do wet mopping at all — there’s no moisture even on level 3 :( Do you know why this might be happening?

smart_display

February 22, 2026

waterMain Brush Becomes Soaked After Mopping

1 mentions

Generally negative

One user reports that after running mop mode, the main roller brush ends up super wet or soaked, raising questions about the mopping mechanism's design.

@Guilherme-xy9sw

After running the mop mode, the main roller brush ends up super wet/soaked. Has this happened to anyone else?

smart_display

March 1, 2026

Xiaomi Robot Vacuum S40 Prochat_bubble_outlineFrom real comments

thumb_up_off_altBuy this if...

What users lovefavorite_border

thumb_down_off_altSkip this if...

What users complain aboutheart_broken

Compare in seconds

Who wins on what

Navigation

Navigation issues

Pet hair pickup

Quiet

auto_awesomeOverall Impression

Xiaomi Robot Vacuum S40 ProFrom real comments

Buy this if...

What users love

Skip this if...

What users complain about

Overall Impression