Amazon Customer 4 I'm updating my original review due to the outstanding customer service provided by ORSDA when I had to return the pet fountain. First, they wanted more details about the problem and then offered to send me their battery-operated cat toy. The toy definitely keeps my cat entertained! This update is late in being posted only because I had to buy new batteries for the toy and I had no time to do so. ORSDA was very speedy in the service they provided. I'd give their customer service 10 stars, but because the fountain did have the filter case issue detailed below, I can only upgrade my review to 4 stars....I'm disappointed that I had to return this item as I REALLY like its design and all the accessoriesthat came with it. As I was setting it up to use, I found I just could NOT open the filter case. I took it to my neighbors in case there was some "trick". They both could open it a couple of times but after many attempts and also with great difficulty. I decided I couldn't fight with it every time I would need to clean it. I didn't use it at all, so I can't comment upon its operation. I think if you have nimble fingers and strong fingernails, this could be a great product! Unlucky me.