cheaper option but immature!

I make it short: was the first robot, he recognizes nothing but rams until all objects in the room before it recedes again. all but in such a pace that he was already so scarred and scratched after 2-3 days (and our Möbe also) that we could not imagine being able to use it for several years properly. He has no plan, just drive around meaningless, cleans without system and leaves much of. but compared with the VR200 Vorwerk (we had it), I have to say that it can clean and much better traveled carpets, and partially better sucked. just what is the use if he himself so damaged so, and driving around with no system. Sorry, there was the product back