I have the drinkwell kind with the six cup resevoir on it. Sunny loves it and is the main one that uses it. I take it apart and clean it every week. I use bottled water in it because I have very hard water and the directions said that this could be hard on the motor. I also fill up the resevoir only once a week so I don't waste any water. Since Sunny has had feline acne, I have to make sure that it's kept very clean. Here's a picture of him drinking from it. He likes to drink from the fountain part although he isn't in this picture.