That part makes clean, good suction, ... but in a normal apartment really do not use. The part moves in a frenzied state through the apartment and slows down obstacles, a small impact, there is always. BUT: He does not always, because if the obstacle is not in front of the Roomba, kachelt the unrestrained against. We have after 2 days using a Scratched refrigerator (the door of the side-by-side is higher than the sensor and the Roomba unrestrained it), scratched cabinets, a large white sculpture was knocked down because the sensor probably not clear to the mirrored polish comes ... Mir us really inexplicable why my car can park for up to 350 EUR alone with sensors and the Roomba 700 EUR go anywhere other hand has to been obstacles to take. Ok, not fair, wants to also say: There are other and much better ways to steer a robot with sensors. Roomba was market leader and also has really evolved nothing in the last 5 years! Pity! Can really little positive to say about the part. And no fun if while the floor is clean but I have to renovate after ...
