Pros: stainelss steel; inexpensive; works well; has a filter; my cat likes it... a lot
Cons: filter repalcement is a bit of a chore and cost; you still have to clean it; the motor needs clenaing every few months; needs topping off fairly often
I highly recommend this fountain for any and all cat owners. it is inexpensive, attractive, works well, and cats (or at least mine) love it.
A few pro tips with it:
-if your cat bites the cord, use a product called, "Split Loom Tubing Wire Conduit" to cover the wires ( works on any wire, not jut this one)
-use purified water, your cat will thank you (I know it has a filter and that helps, but starting with purified will reduce maintenance and make your cat happy.)
-if the motor stops, you can take it apart and clean the impeller out (they have a video on the pioneer pet site), and that will usually fix it. It happened to me once, and a quick cleaning did, indeed fix it.
-if it makes weird sounds, top the water off