I tried one of those once, but I think the water gets stale sitting in the bottle; one of my more finicky drinkers refused to use it. Also, the little hole where the water come into the dish needs to be cleaned regularly so that bacteria doesn't build up.
Have you tried a kitty water fountain? For example:
http://www.amazon.com/Petmate-Deluxe.../dp/B000084F2Q This keeps the water filtered and circulating so it doesn't get stale and the flow is entertaining for kitties (part of hte appeal of the fish tanks, I suspect).
