You guys have raised up a lot of valid concerns that I didn't even think of! So I've decided to just stick with the more traditional litter box for now. I'm going to get the Scoop-Free or Litter Maid self-cleaning one, so it's more traditional, but still a little more automatic. Seems like a good compromise since this one is rather expensive to take a risk on something that may not work very well.
But anyway, just wanted to say thanks for all your thoughts and helping me make a decision!
Steph