What a great product! I bought one 7 years ago and it got tons of use (5 cats).  The new one works great, I have 3 litter boxes and now at least one is always clean.  I like the new scooper that cleans between the rake.  Cat's have no problem using it and were never afraid of the motor- they actually are curious and think it is interesting.  I Highly recommend this one for every cat owner!!!