"I recently saw this product online, while I was researching what I would need for a new hamster, and decided I had to try it. My guy's still a baby, so I had my doubts it would work, but it did. He figured it out in a few days. I did have to place it where he wanted or he wouldn't use it, though. But the directions that came with it worked wonderfully.
It's very absorbent and easy to change. I use it with one of the corner trays, as my hamster is a Sirian and I didn't think the "Hamster Potty" would be big enough once he got older. The only problem I have found (and maybe it wouldn't be a problem with the "Hamster Potty") is that when he was first learning what it was for, he would kick it all over the place. That behavior only lasted a day or two, and the extra cleaning I had to do at the time was well worth it.
Also, he would nibble on it, thinking it was food. But that has stopped, too. All in all, I think it's a great product that works extremely well. I don't have to clean his cage as often, just the litter."