Catit small water fountain has been a great success. Neither of the cats were scared of it and were interested in it straight from the off.
Cashie loves it, is drinking really well and his urine no longer smells strongly of ammonia. Izzy drinks from it too.
It is pretty quiet too, I hardly notice it, my bedroom window opens directly into the conservatory (we have a weird house!) and the fountain is less than 4 feet from my bed and it doesn't disturb me.
A brilliant buy from zooplus for £15.90, got some replacement filters too and got free delivery. If any of you are worried your cats are not drinking enough I can heartily recommend it.