Works fine, I just upgraded to a more spacious litter box. It's a few years old, and one of the earlier models but it never gave me any problems. It would benefit from a cleaning, which I don't really want to do, so it's free to the first one to claim it. I have deodorizer and generic bags with it. It's ready for pickup now.
To use it you will need to use the Petkit app on your phone. It is Internet connected, and lasts about a week before you need to do anything with it in a two cat household. Probably two plus weeks for just one cat.
Looks like its discontinued, but here's the manual from the manufacturer:
https://instructions.petkit.com/App%20Manual/T3/T3-4_User%20Manual_V1.0_20230711_EN_.pdf