That fountain, whilst being the only one I've ever bought, has been nothing but wonderful. I bought it 3 years ago and it has served my two cats continuously ever since. I see people complaining about noise levels and longevity issues, and let me tell you the secret to have a long lasting and quiet cat water fountain. CLEAN IT. Here's what I do (for two cats, remember); every day I change out the water (keep the reservoir full, it's what keeps the pump from sucking air and being noisy), every week I clean the fountain itself and the pump (disassemble it to clean it thoroughly, cat hair and saliva can get stuck) and every month I change out the filter, That's it. That's all you have to do.