Shark RV2502AE/RV2520A AI Ultra Robot Vacuum

Fast. The Shark AI Ultra maps the home quickly with its LiDAR, and the app then lets you name rooms, draw no-go zones and start a run while you're out. Once rooms are labelled you can send it to just the kitchen after dinner instead of running the whole floor.

Yes. It crosses from hardwood to carpet and over thresholds easily, picking up dirt, dust and dog hair along the way. The one gap is behind furniture: the RV2502AE can't reach in there, so the strip behind a sofa or dresser still needs a stick vacuum now and then.

Error messages, mainly. Some units start throwing repeated obstruction or other errors after a while, and in one case the RV2502AE got stuck whenever it lost its Wi-Fi connection. A steady signal across the rooms it cleans helps, but a unit that keeps erroring is worth taking up with Shark while it's still covered.

Every month or two. The base empties the robot and the robot goes back to finish the job, and even with shedding pets the base bin stretched to roughly every 60 days in one home. That matches Shark's claim of up to 60 days of debris, and the base is bagless, so there are no bags to buy.

Recharge and Resume sends it back to the base to charge, then it picks up where it stopped. Shark rates the battery at up to 120 minutes per charge.