"My hamster Daisy loves it! It isn't as big on the bottom as I thought it would be, but having the multiple levels is helpful and gives it more room. The top level that you attach is a lil shaky, so we didn't even put it in, but she doesn't seem to mind. Daisy stays on her wheel most of the time. If you get this- make sure you go buy the silent spinner. The wheel is terribly loud!"