Have the S5 Roborock and it has been great for 5 + years. Purchased the Q Revo during prime day and it is a full house cleaning machine. And agree the app is very functional and easy to use. It is very quiet compared to other robot vacs. The only issue I've had is the auto empty port clogged with dog hair once when we hadn't vacuumed in a week. Relatively easy to clear and hasn't happened since.