I've run a landcare business for 20some years and a few of my clients used to have robotic systems. The cheaper ones have wire around the boundary. The better and more expensive ones use GPS and you set the perimeter via an app. Like everything else, the more money you spend...the better the system. For the cost of a family cruise you can get a good one that you won't even know is there. There are pluses and minuses.
They don't trim, edge and blow, so you're still on the hook for that. Sensors keep them from running over pets, but won't keep them from hitting things below the grass line, like golf balls or landmines left by Fluffy. When the battery hits a certain level it will return itself to the charging port, charge, then get back to work. They are super quiet.
The big down side is that you don't get stripes.
The models on the market 2 years ago weren't available last year. Last years models have already been replaced - truly, the quality of products on the market is advancing so fast that by the time you read this... People love them though.
I have a few clients who used to have them. In talking with them they say:
1. They missed the stripes. Appearance means everything to many people.
2. They missed watching the grass grow. This one struck me as odd, but because the mower is working on a regular basis they never got to see the lawn at varying heights. Whodathunk this would be a thing, but when you think about it I guess there is something to it. Kind of like when music CDs came out (before you were born) there were people who missed hearing the pops and crackles they'd grown used to. (I kid you not, that was a thing.)
3. They missed having someone handy to pick up tree limbs, trim shrubs, mulchwork, etc. Those things can be hired out, but if you're a regular customer you get it done for a miniscule fraction of the price I'd charge someone who pulled my name out of a hat.
4. Fenced back yards are a problem if you don't want to leave the gate open, or move the docking system.
The good systems are some serious coin, they have a shelf life, and they're not maintenance free. Find a decent lawn care company, leave a cooler with some Diet Coke in it with a note on top, and pay the $1200-1400 year.