After some 4+ years, we are as pleased with the Kitty Poo Club litter boxes and the fine-grain silica litter as we were the first time we used them. We've never had an issue with odor (visitors have often said they didn't know we even had cats until they actually saw them), the boxes do not deteriorate & do not leak - no matter how much the cats scratch at the bottom & sides! We appreciate that the used boxes can also go in the recycle bin. Set up is easy (my blind husband has no problem doing it). The monthly cost is no more than what we were paying with the plastic pan & litter from the store - an added bonus is that we don't have to tote a heavy bag/bucket & don't have to wash the pan! There is so much positive I could say about this exceptional product. One very important point, though, is that the Kitty Poo Club staff are as wonderful as their product. Every time I have contacted them, they have been friendly & helpful. We have never been disappointed with these products or the company.