Hello There, I gerreinigt my little, about 25 m2 large terrace with it and it worked out well. The assembly was easy, the only thing not so good is the fact that I can the container for the cleaning agent is not directly attached to the device (or did I miss something about advice I would be happy) It is next to the device and can therefore fall over. I had definitely fun for the first time, to clean meien terrace.