I recently upgraded my old robot by purchasing a newer model, therefore it is no longer doing the laundry. I would like to comment on the design because it is quite attractive. I hastily constructed a map of the flat, and the robot successfully navigated all of the tight corners without once veering off track))) It operates quietly, and while I agree that expensive detergents are necessary, the effect of such detergents is not always immediately obvious; I have a white carpet, and after using the vacuum cleaner, it looks and smells brand new (including the scent of cleanliness, that is).