I was skeptical about this type of device ... After two uses, this robot is extremely effective, and easy installation and commissioning incredible walk. The carpet seems to me that with our own vacuum cleaner BOSCH. We simply provide a socket with a space of one meter on each side so that the robot finds its base. By cons, it is VERY noisy, but in programming mode, it is not so ... In this apartment can be a problem, test with neighbors.