I really like this product. I use it in combination with the Litter Locker to keep my bathroom smelling good, and to keep litter off of the floor. The amount of litter tracked through my house went from 60 to zero. There is a little bit of effort in that whenever I clean out the bin, I vacuum the ramp, but it is much easier than vacuuming the whole house. I have heard that a few of the more timid cats are afraid of going in, and I have also heard of cats urinating on the ramp. I think that maybe their owners are not vacuuming the ramp, thus the cat thinks that the accumulated cat litter is part of the rest to go in, because I have not had that problem. Also, purchase replacement filter cartridges, because they make a huge difference in odor control.
Update (7/11): This product still works great, and looks practically brand new. I thought that I'd add that all of the cats that used this litter box were female, and I never had more than two cats using it at a time. I also found that it worked best with good clumping litter (I used Tidy Cats Multiple).