"I gave this thing an honest try- really, I did. At first it seemed like the best thing since sliced bread, but after a while I noticed that the inside of it was getting really nasty, especially the rake, which was coated with a seemingly bionic brown material that was impossible to scrub off... maybe it was just cat excrement and not rust, but there's no good way to get leverage to clean the rake, and it's not removable. Anyway I sucked it up for the convenience of not having to scoop all the time, and then... it happened.
OK look folks- I have one small cat, who is generally very well behaved. Thus, I have no explanation for how this happened, but after a few short weeks since the last cartridge change, I lifted the mechanism up to reveal a massive puddle of urine all over the carpet. OK, so you may say that's my bad for not putting a cardboard box full of cat urine on a rubber mat, right? So I cleaned the whole mess up, dumped a gallon of Nature's Miracle on the rug, let it dry, and started over with a rubber mat and a fresh cartridge, eager to believe that I had done something wrong, and that the problem couldn't be that one cat could urinate enough in a few weeks to penetrate this costly product's flimsy cardboard bottom. I read the website, searched forums, etc., until I was confident that I was doing EVERYTHING right.
Two weeks later, as I walked in the room, an overwhelming stench prompted me to lift the unit up and... you guessed it... urine everywhere, including off the rubber mat onto the carpet again. This time I dumped a little too much Nature's miracle, and it leached into the kickboard, which warped, and is going to have to be replaced. Plus it still stinks in there. Oh and did I mention that I'm trying to sell my house right now?
Anyway I heaved this expensive hunk of junk into a dumpster and put an old-fashioned cat box in the tub. The cat is happy and so am I... don't bother with scoopfree, you're wasting your money, and possibly putting your home at risk in a big way."