I have one and I go back and forth on using it. Right now I am back to the traditional siphon. My main issue is that when you suck up a large amount of waste, look closely. A "cloud" of waste particles will make its way through the screen after the rotating drive chops it all up. After cleaning a large amount of waste I notice my tank water is a little cloudy. It is convenient, especially for bare bottom tanks, but I think you sacrifice a little water quality for that convenience.