Pros: Will relieve your wallet of excess cash. Easy to install.
Cons: Having to replace the brand new carpet that is now urine-soaked.
I've had the Cat Genie 120 model for 13 months of which it has worked properly for 2. I made the mistake of buying based on the 2 year guarantee which, in practice, doesn't exist. Chances are your call to customer service will go to an answering machine and you may or may not receive a call back from a very rude and unhelpful person at an inconvenient time at which you'll be expected to drop everything you may be doing (like cooking dinner) to perform phone-guided tech support on the filthy thing. My end result is that I've gone back to using a regular litter box for the past 8 months and now don't know what to do with this monstrosity that I can't return.