The robot fails to return to its dock reliably, with one user reporting a 20% success rate and another reporting zero successful docking events since purchase.

“Since I've gotten it, not once has the robot been able to return to its dock. It will either give me an error to clean the location beacon on the dock or the robot will just wonder around the house forever 'returning to dock.'”

vs Marketing: Marketing claims 'a totally hands-free cleaning experience' and that the Ultra Dock 'enhances hands-off maintenance,' but users report the robot routinely fails to dock, requiring constant manual intervention.

Persistent water leaking from the unit has caused device failure, and Roborock support has told at least one user the leak is considered 'normal.'

“The S8Pro Ultra has a significant leaking issue. Since receiving our robot vacuum in November 2023, we have sent it back for support twice, but they've now informed us that the leak is considered 'normal.'”

vs Marketing: Marketing claims the all-in-one docking system 'prevents unpleasant odors' via automatic mop washing and drying, but water leaking — deemed acceptable by support — directly causes hygiene issues and has led to device failure after 9 months in at least one case.

Multiple users report device failures within months of purchase, including Error 42 requiring warranty replacement and a case of 7–8 repair visits with no lasting resolution after warranty expiry.

“Once the warranty period ended, I started facing ongoing issues with both mopping and vacuuming. I ended up sending the robot in for repairs about 7 to 8 times, with each repair process taking more than a month.”

vs Marketing: Marketing positions the S8 Pro Ultra as 'one of the most autonomous cleaning systems available,' but real-world ownership data shows repeated hardware failures and a customer support system described as 'basically non-existent' for warranty disputes.

Mopping performance is inconsistent across owners — one user reports severe underperformance versus the predecessor S7 MaxV Ultra, including loud noise during mopping, while others are satisfied on hard floors only.

“The mopping feature has been underperforming severely compared to my previous S7 MaxV Ultra. I noticed that the robot started making very loud noises when it began mopping which is something I never experienced with my S7.”

vs Marketing: Marketing claims VibraRise 2.0 means 'the mop can clean anything and everything, from soda to dried-on spills, effortlessly,' but at least 1 of 3 owner data points reports severe underperformance versus the prior generation, and the mop lift height is only 5mm — a limitation Roborock itself acknowledges.

At least one owner reports the robot frequently halts mid-clean, loses its map position, and requires manual repositioning, making it unable to complete a full clean of a 10-room home.

“It frequently halts, loses its position on the map, and freezes unexpectedly, requiring repositioning. Mapping my entire 10-room home has been a persistent challenge.”

vs Marketing: Marketing implies seamless autonomous navigation across the home, but this user's experience shows the robot cannot reliably complete a single cleaning session without human intervention.