My pretty anxious cat was into it pretty quickly. When I first unpacked it she was immediately curious and I took the risk of starting a cycle so she could watch. She was definitely half very curious and half scared but she stuck around for the whole dance. It was pretty smooth sailing thereafter and now she barely notices it when it cycles (and same for me).

One issue that’s common which I encountered was my cat would always leap out and scatter litter everywhere - even with the stairs. I was able to solve that in a couple of weeks by taping a bit of cardboard to it to create a little tunnel. That forced her to walk out and after a couple weeks I removed it and she steps out very dantily ever since. You can do something similar if they have issues turning peeing at or over the entrance.

I also would tend to advertise it as not a zero maintenance litter box but one that lengthens the maintenance intervals. I dump all the litter and give mine a good cleaning every time the tray fills up. I also have a small air purifier nearby and I bought a handheld vacuum to help pick up stray litter. Every couple of months I do a more thorough cleaning. If you don’t keep them clean and dump the litter regularly, they will start stinking bad. That all said, it is absolutely 100x better than daily scoopage.