Have had my Genie for 6 months. I have it sitting in the spare shower upstairs. This thing is amazing! I had to watch the first cycle all the way through.
The cat still tracks the pellets in her paws, but there is no dust like the old automatic litter box. I just hit the floor with a broom a couple times a week and handvac the pellets. I throw them right back in the unit.
I have had to clean some small pieces out of the unit with a litter scoop a few times, when it is not real solid. It does smell a little fowl when the dryer hits it, but not a big deal. I personally love the smell of the scented solution.
I love the ease of this unit. The cat loves it and the dog can't raid the kitty litter. Even when the cat used the toilet, it wasn't this easy!
The initial investment is a little pricey, but with the price of good litter, I feel like it will balance out.