Expensive, not very ecofriendly, but does the job.
Pack did not include the conversion tray, which in fact I did not need, but the ad implied it would come with one.
The integral plastic tray means a big chunk of plastic needs to be recycled. Would be better to have a reusable tray and only replace the filters.
But it does fit my water fountain, and the cat likes it.
My Cat, Mister Poshy, is a Munchkin with small legs and this is a Perfect size and height for him comfortably. I can see all the time how much Mister Poshy is actually drinking each day. And it's Silent! Fabulous!
The Petkit water drinking fountain is ideal for my cat as he only likes drinking running water. It's easy to clean and it let's you know when filters need changing. On the subject of filters, it is hard to get replacements and they are very expensive at £45 for 5.