Here is the direct link to the Cat Genie,
http://www.catgenie.com/

That looks really spiffy, but I would hate to spend $299.99 on something that my cats might not use.

How many cats can use one CatGenie unit?
The best success is one CatGenie for two cats who weigh up to 20 lbs. In some cases, three cats can use one CatGenie unit. If you have three cats using one litter box now, then they shouldn’t have a problem using one CatGenie unit. Kittens over 8 weeks easily adapt to the CatGenie.

Well, I would say that this definitely would rule out someone with multiple cats. Just look at the price to order 3 or 4 of them.