Fontaine perfect for several cats. The adjustable water flow can control the sound of lapping, really nice to hear. The pump is submerged in water, is virtually inaudible. No leaks reported. The assembly is easily disassembled for cleaning necessary for the health and the life of the device. A permanent plastic pre-filter (to capture hairs, for example) and a charcoal filter (for the "filth" in tap water). Note that this filter, replaceable, is not absolutely essential for the proper functioning of the fountain (it is a "plus", as noted in the instructions). But if you look closely, you will not ruin yourself to change. For a fountain of 5 liters, I expected a more impressive product. And the main, cats love. They drink "at source" or bowl, the fountain encourage them to consume more, which is to improve the lives of cats with urinary or kidney problems. Frankly, nothing negative for me.