My cats were basically indifferent to the fountain aspect of this product, to my surprise given that they love the shower so much. But I was pleased to have a fountain that continuously filters water and holds a good deal of it (very helpful for going out of town on short trips). I was disappointed, however, at how quickly the fountain gets scummy (I have two cats, so I'm sure that makes a difference) and the filter gets clogged, causing the water to run over it instead of through it. This basically defeats the purpose and causes a bit of a cesspool effect on the back side of the filter. Cleaning is straight forward enough, though, I have found that all pieces except the pump are dishwasher safe. I would recommend running the pump through some very dilute water/bleach solution to kill the scum that builds up around/inside it (rinsing very thoroughly before using again in the fountain).Overall a good product - a bit cumbersome, though.