This is a great product. Over the past years, it's been very difficult to get my cat to drink enough water, and at times he ended up with water packs on his back (done by vet) to battle dehydration. He's normally quite skittish, and I dispaired of him using a water dish that "hums", but he took to it immediately, and I'm VERY pleased to say that he's never been in a dehydrated state again. I can't believe the cost on Amazon.ca though. I looked here first, but ended up purchasing it at Amazon.com for $33, so even with shipping, handling, import duty and taxes, it was still $20 less than this site before the shipping/handling was added in. The product itself is excellent.