I really enjoyed the Ring Fit. But my gimp knee didn't. There's a lot of jogging in that thing, and my bad knee just quit on me a couple of weeks or so into it. My knee's always been bad due to a childhood accident, but it's worse now that I'm older and it's more worn out.
I'm aware that there's less impactful things you can do, but I didn't consider it when I started...and once the knee gave out, I couldn't even do squats and such, so I put it away and haven't picked it back up. I guess now that some time has passed, I should look into it and just low-impact from the get-go.