Once I received my order, I set the box up as per the instructions. Surprisingly, there was zero adjustment time with my cat -- she took to it IMMEDIATELY.
It's hard to believe it was working at first. The bowl rotates very slowly, to facilitate usage from your cat. It moves at about one rotation per hour.
The advantages to this unit are obvious. I've had it set up for over a week and have yet to clean it, replace letter, or dump the receptacle. The litter is smooth, even and clean.
The downsides, however, is that this unit is large and noisy, and if your cat likes to kick litter, there is almost zero defense against that. The retaining wall is much too short to prevent a mess.
About a day after I got the unit it started making this plasticy creaking noise, followed by a loud POP, every 30 - 45 seconds or so. Surprisingly, it doesn't scare off my cat; but I can imagine the noise being quite disturbing to others.
The company does stand behind their product, and they will provide pretty prompt technical support and suggestions. If that fails, they usually do not hesitate to send out a new unit.
EDIT 02/06/2014: Downgraded this from 3 stars to 2 stars. The unit is just so cheaply built, that one of the retaining screws that bolt the conveyor into place is now simply just free-spinning, which no longer holds the "wall" of the bowl in place, which means that litter goes EVERYWHERE now. I've now had to try to fix it with duct-tape, but that's only a temporary measure... and errect a garbage-bag "retaining" wall around the entire unit to catch any stray litter.
In my opinion, this product is in need of a re-design, or a "version 2" -- something of higher quality would be great, as well as a full enclosure around the entire unit to catch any mess... The "wall" ontop of the bowl just does not cut it!