The litter robot is great as long as you empty the tray every few days. It runs into issues (like many things) if you let it go too long. I've owned two. Once

The litter robot is great as long as you empty the tray every few days. It runs into issues (like many things) if you let it go too long. I've owned two. Once you get past the sticker shock, it's quite convenient. I also used regular kitchen trash bags for the tray. Was perfectly serviceable.