This fountain is fine. The instructions are relatively clear on how to install it and adjust the flow rate, but there are a lot of steps so cleaning it is a bit more time consumer than fountains I’ve had in the past since there are so many pieces to remove and clean. I like that you can adjust the flow, but it would also be easy to lose  the flow control piece during cleaning since it’s very small.  I have sensitive hearing, and the low frequency of the pump does bother me. It’s not loud, my fiancé didn’t even notice it, but it gave me an unsettled feeling like an elephant that hears the vibrations of a tsunami coming. It did encourage my cat to drink more water which is a positive, but I wasn’t wowed.