I've had my catgenie for a little over 6 months. I love it. I have two cats, and I think they really like having a nice clean litter box every time they "go". They didn't take to it right away. I had to put the catgenie granuals in their old litter box, and then they figured it out. No problems since then! Yes, the granuals do track. The catgenie is in the carpeted basement with carpeted stairs, and the granuals still show up all over the upstairs of the house... so it tracks. I've found that the less litter you keep in the bowl, the less it tracks. I'm just now ordering more sanisolution, so I've gone through about 3 units in the 6 month time frame (I use the cat sensor setting). I haven't had to buy more granuals yet. I did have one issue with performance, and it was really my own fault for trying to "save" the granuals. I vacuumed them up and poured them back in the catgenie. There was too much dust and hair, and it clogged up the sensor. The tech support was awesome, walked me through every step to get it back in working order. It's so nice not to have to worry about getting the litter boxes (yes I had two before) cleaned each week.