Zuerstmal the positives: The cleaning power of the device is surprisingly good and the battery life in order. That which has not at all convinced me is that the 4 small rollers on which the device is rolling across the floor to record a few seconds many hairs that the plain bearings of the rollers are blocked and this finally stop. It then uses the broom still further, so it drags the rolls gently down and then they never rollnen again. You can see the roles relatively easy to expand for cleaning, while there is but unfortunately injury, because you have to hang up the device for this purpose with the top down. You then handled with the rollers, so the motor will turn on (the switch is on the top) and now you caught quite nasty on the rotating brush fingers. So rather stay away, and for two reasons .....