Designed for humans, not for kittens
The fountain works as advertised. Very silent and fine if you do the regular care as advised. However, it is designed with humans more than kittens in mind.
The trouble we have is that the small "holes" designed for the human to pick the fountain up, are an irresistible temptation for kittens to explore!
In our case, we have two 7kg Maine Coon kittens who inevitably are tempted to slide their paws into the holes and start pulling, which makes the water splash all over with a resulting mess.