Automatic Litterbox Central

I'm thinking of getting this litter box to replace a littermaid. It takes me 2 hrs. to clean the "maid" because some of my cats urinate on the side then throw the litter on it. The teeth in the track become caked and have to be cleaned out with a tooth pick. I haven't seen a purrforma so don't know if the tracks have teeth or if they are covered by the side to keep them dry. Does anyone have experience with 'wet' tracks? What kind of problems do you have cleaning this box?
thanks,
Lynne

so my two broke, petmate sent me two new ones. I am going to take them back to petsmart and get my money back. NOT WORTH THE TIME, MONEY, and is a PAIN to clean!