Expensive Poop

We haven't been fully able to keep up with the cats' litter boxes recently. I'm thinking it may have been a switch in litter but it's not as clean and it's smellier than normal too. I thought about getting a LitterMaid but after reading all the extremely poor reviews I decided not to. There's also the Omega manual box that you roll around to sift, which isn't exactly an automatic litter box is it? The only other one that seems worth checking out is the Litter Robot, which is this spherical thing that rolls around and sifts for you. It looks great and all the reviews are pretty awesome but the price is outrageously high for a toilet of any kind. The things that keep drawing me back are the 30-day return policy and payment plan. Really though, isn't it kind of extreme to have a payment plan for something like this? How much do you wanna bet I'll end up with one anyway? LOL!