I have had four to five household cats for years and have been using fountains for a long time, so I have a good idea what features are useful and what can be a hassle to deal with. This very compact multi-level fountain comes in right at the top of my list of favorites.
It is small, considerably smaller than ones I've used before. The others held a good bit more water, but I've found that having to add water every two days or so helps to keep the water from remaining in the tank too long. Even with a good filter, eventually food and hair build up in the big ones, clouding the water. This size is just right for a fairly large brood of cats to maintain plenty of hydration with relatively little addition of water.
Mine took all of about 12 hours to get acquainted with it and start to use it enthusiastically. They drink from different heights, for some reason, but they all seem to love it.
This is a breeze to clean, too, compared to some with labyrinthine twists and turns in the underside or bowl. The plastic material seems to clean up easily in our water, and the pump is the standard one you see in many fountains. It is quiet and dependable, when cleaned at regular intervals.
All in all, this fountain is a great find, and a real value if your goal is to get your cats to drink more water. I highly recommend it, and would buy one just like it should this one ever need to be replaced. I see why it has hundreds of five-star reviews to its credit.