Expert: Brandy - 3/6/2007

Question
Hi,
I want to buy a new letter box for my cat below is the full detail about this ScoopFree Automatic Self-Cleaning Litter Box which I found in Petco.com,
I have 2 concerns:
1- Being electronic device, How safe is it? would it harm my cat??
2- I think the Tray-Cartridge is not deep enough for my cat to dig, so she might not find it comfortable.
I would appreciate it if you check in this site Petco.com, or otherwise recommend another.

Many Many Thanks
ScoopFree Automatic Self-Cleaning Litter Box
ScoopFree™ is the world’s first automatic, self-cleaning litter box you can leave alone for up to 30 days! ScoopFree features a unique 30-Day Throwaway Tray™ filled with Fresh Step Crystal litter which you replace as little as once a month without any scooping, refilling or cleaning. 20 minutes after your cat leaves the litter box, ScoopFree will automatically rake the waste into the tray’s covered trap so you can enjoy hands-off convenience for weeks at a time.
View complete product info below
ScoopFree™ is the world’s first automatic, self-cleaning litter box you can leave alone for up to 30 days! ScoopFree features a unique 30-Day Throwaway Tray™ which you replace as little as once a month without any scooping, refilling or cleaning. 20 minutes after your cat leaves the litter box, ScoopFree will automatically rake the waste into the tray’s covered trap so you can enjoy hands-off convenience for weeks at a time.
How?
Each Throwaway Tray comes already filled with Fresh Step® Crystal litter, which provides unbeatable odor control. The Fresh Step crystals lock away the odors, absorb the liquids and dehydrate the solids to keep everything smelling clean and fresh. As little as once every 30 days per cat, discard the entire Throwaway Tray without having to see or touch messy waste. Then insert a new tray filled with fresh litter and ScoopFree will keep everything smelling clean for up to another month.
Safe for You and Your Cat
•   Roomy and comfy
•   Designed with gentle curves
•   No sharp points on rake, which has rounded loops for extra safety
•   Rake stops if it encounters an obstruction
•   Countdown timer resets if cat re-enters the box
Tested and Reliable
•   Resists clogging and jamming
•   Powerful and durable motor
•   Shhhh…it's really quiet!
•   Designed in the USA
•   Patents Pending


Answer
I think some of the other allexperts might be better at offering insight into this since - in spite of my small herd of cats - we don't have one (unless you count my husband as the automatic litterbox cleaner).

I have heard from other pet owners that this is a wonderful item, but you need  to acclimate your cat to it, and there might be some cats that will never take to it.   I also think that the company that produces it might also have websites and/or CDs that explain how it works.

I'm curious, too, to see if this would be a great idea.