We started with your basic open cat box. Yuck. Since then, we've had nearly half a thousand dollars worth of Litter Maid electric litter boxes. The first one worked fairly well. It lasted a whole four years. The second one lasted about 2 years until the motor was no longer able to move the larger clumps. I called Litter Maid and told them the problem. They helpfully suggested we spray the box with Pam. (Yeah.) After hemming and hawing, they agreed to replace our unit. They made us open the old one and break off a part of the logic board with a bar code on it and either send it to them or take a picture of the broken piece in the same frame as the logic board from whence it came and email that. So that's what we did. The replacement box lasted two years, at which time we were emptying the damned thing like an old fashioned wooden crate with sand it it.
Dis Gusting.
Litter Maid is crap. Period.
My son has had one of these for more than 10 years, with never a problem.

So we got one. It assembles in about 13 seconds.
The initial litter fill is a lot, but after that you just top it off. It works *exactly* as advertised. If you clean it every other day and refill it once a week, you have virtually nothing else to do. You can clean it without gloves, while wearing a gown or tuxedo. Each time you empty it, it takes no more than 30 seconds. We keep a closed top trash can, lined with a plastic grocery bag, next to it. Roll, pull the drawer, empty in can, replace drawer, done. It *really* is that easy.
The cat likes it, too.
The only downside is that it needs some room. Assume that, as a minimum, you need three times its width to roll it.
I would recommend this to anyone.
http://www.petsmart.com/product/index.jsp?productId=2754459&utm_source=googleproduct&utm_campaign=1822084&utm_medium=cse&mr:trackingCode=A9C22C64-C881-DE11-B712-001422107090&mr:referralID=NA