"This is a great, very quiet fountain. Very little water noise if it's set up right. And you can avoid most of the things people have reviewed negatively about if you know a few tricks.
Complaint: It makes a lot of water noise and overflows, spilling water onto the floor.
If you make sure the water is running evenly over the entire dome, this shouldn't be a problem. The instructions say to rub your hands over the dome, but I've found it better to direct the water from where it comes out the top first. It sometimes takes a few seconds to get it flowing right, but once it's going, it'll stay that way and won't spill.
Complaint: It's hard to get the dome to fit on the base.
Sometimes it takes a little jiggling, but only a couple seconds. If it won't fit right, the little green cap on the base probably fell off. Set that right and it fits easy as pie. (assuming pie is easy...)
Complaint: Water doesn't drain into fountain. Pump is noisy.
The dome is probably not seated correctly. When it's in place, it's very secure. If the dome feels wobbly, it's not in the right place yet.
Complaint: Bowl gets a slimy feeling after a few days.
I'm told this is due to hard water, not the fountain. The filter, unfortunately, isn't as thorough as a pur or brita filter, it just removes hair and such. But that it does fine.
I gave it four paws because ideally a fountain shouldn't have to be fiddled with to work properly, but it does come apart so you can clean ALL of the inner workings and it has less water sound than most other fountains.
Oh, and my cat loves drinking from it. Which is ultimately the most important thing."