I've had one since they first came out and I'd hate to be without it. It gets used once a day every day in the shower and during the winter also on the bedroom windows to clear condensation. I use it inside and out on all my windows and I have quite a few and it also does my mirrors, not used it on the car yet though. It's not heavy but obviously it gets heavier as it fills with water but not much. I don't have the Karcher liquid or spray I use much cheaper alternatives, but I do have both sizes of head which has been useful.