We've had tbe litter loo too for 1 month now & it's been great for the most part. One time the litter got behind the drawer somehow & the red light came on, but no tech issues. We have 3 cats & 2 of the 3 use it. The 3rd is approx 18 lbs & seems scared to go inside even though she has to go into a small hole in a cabinet to go into the old box. We stopped cleaning the old box for 2 weeks, but she still used it, gross. So, we're trying catnip & treats.