I owned a previous model (probably 10 years ago) and was very impressed with how it worked. Unfortunately one of my cats refused to turn around upon entering and she would then urinate on the control pad and step/drawer. A later model added additional space and a clear window to the back of the drum to help with this behavior but I never tried it again.
If your cats cooperate I don't think there is a better automatic on the market and I tried a bunch.