Great product
I've been using it for more than a year for my 2cats,they are outdoor, but do tend to be a bit more in the cold and wet weather, I found that like others have said, all the wee goes to the bottom, but it's not a problem, I just use litter liners! My cats like it, I don't have any smell from the tray, and I remove the poos daily, but change the full tray maybe once a month. I personally think it's a brilliant product and will continue to use it 😊