I love mine, I paid $20 for it at Petsmart. It came with the first thing of bags, and cleaning my one litter box out twice a day (2 cats in on box) the roll thingy of bags lasted me almost 3 weeks. Of course, I do not turn it every single time, if there is only a little bit of dirty litter I would not turn it. The refill cartridge is $8.99 at Petsmart, well worth it in my opinion. I like it because it helps keep my 2 year old son out of the dirty trashcan!