I have two petmate fountains and I am so glad I got them!! I have the small one and the jumbo one. All the animals love drinking out of them. And I find them very easy to clean. I am a bit of a nut when it comes to cleaning for my dogs so I take the fountain apart almost every day and clean it out and replace the filter every two weeks even though they are good up to two months. It is a bit more work than just cleaning out a bowl but I would never switch back, atleast I know my fluffs are getting clean fresh water. Plus I don't have to fill it up as often as I do with a regular bowl.
I am looking to get another fountain here soon for just the cats. I highly recommend pet water fountains!!