It is one year since I purchased the LR for my two cats. ONLY one of them used it at first; however, after 4 or 5 months of the 2nd kitty "watching" the thing turn, move, etc. she decided to poke her head in and voila -- she's a devoted LR user now, too.
Not sure how far the LR would last, work for two cats I purchased another one (as a backup). I am happy to say I have NOT had to put that one into service.
I can relate to the previous poster's comments and history regard her experience in 2000 with the LR, I have had a similar experience with the Litter Maid. Purchased one for my daughter's 1 cat. Didn't even last a year - burned out. Company wasn't cooperative at all. Therefore, I bit the bullet and purchased a replacement Litter Maid (it was the only popular automated litter box out at the time). You guessed it -- didn't last a year!
So AFTER two expensive purchases, my daughter has reverted to "manual" labor when scooping out the litter box.
She's not in a position to afford to purchase a Litter Robot but I'm considering a gift of a LR for her/her two cats.
I think it is highway robbery by some of these companies when people spend GOOD $ and get "crappy" product (no pun intended -- with the word crappy

)