We got a Litter Robot after this past Christmas. We opted for the LR3 because the reviews were better and it was slightly less expensive. There are of course pros/cons, just like with anything.
First be aware - they like to sell the feature that you can have the app on your phone that tells you when you need to change the box, add litter, and when your cats do their thing. But what they don't tell you is that if you have 5G internet service, you cannot connect to the app. I spent a long time trying to fix this problem before I became aware of this issue and so I just don't use the app at all.
We have 2 adult cats. I change the box twice a week now. It is fairly easy and only takes a few minutes. You don't have to buy the LR collection bags; you can get cheaper substitutes on Amazon. With the PetSafe Scoop Free litter box we had before, I changed once a week but those litter trays are EXPENSIVE and bulky for your garbage can.
If your cat(s) like to dig, they will kick out litter. Get the guard. You will still have litter kicked out but it won't be quite as bad. I vacuum the area every few days.
You have to use a level surface. Double check your measurements and make sure you have an outlet nearby or plan on using an extension cord. When we set ours up, the cord they provided was barely long enough to reach the outlet and when we started using is, the cord got caught on the hood at paused the rotation which definitely defeats the purpose.
You should plan on deep cleaning the hood at least every few months outside with a hose.
YouTube has a lot of helpful videos for set up, cleaning, and trouble shooting.
Overall, I'm fairly happy with our purchase. The cats took to it immediately....like they jumped into it the second I set it up.