I bought the largest LitterMaid off of Ebay in Jan 2003 from a Seller called KittenKaboodle. It took a few trials to find a litter that worked well but I settled on Scoop Away. Yes, as some reviewers have mentioned, sometimes it does stick to the bottom and you will have to use the scooper to scrape it up or clean the rakes sometimes. Then, I just turn it on and off and it will rake everything up.  It only takes me a few seconds to check for any stuck spots or even out the litter, turn it on and off to make it rake and then add a little new litter to the top (so the cats think it's nice and clean). :-) It's not completely "no work" but it is a lot less work than a "manual" litterbox and stays smelling cleaner than manual boxes.  I do use larger plastic grocery bags in the receptacle. It's a lot cheaper than throwing away receptacles every 3-4 days and it's alot easier to clean. Believe me, I do not like trying to pry those receptacles out when it is completely full.  You have to stick your fingers inside to grab onto it (YUCK!) and it's heavy and hard to get out sometimes dumping litter and stuff all over the place (double YUCK).