We had a Kinetico system in our last house that worked great for 20 years. It had two great features and one Ok one. The great features were that it was demand based (not time, never buy time based as it wastes salt and your money) and that it was dual tank. So if it switched over when you were running your laundry or a shower you didn’t get hard water while the single tank regenerated.
The OK feature was that it was run 100% from water pressure - i.e., without any electricity. In theory this is great, in practice we had to clean the gears twice in that 20 years when they got stuck with a piece of grit in the gears.
Despite the above, I don’t recommend Kinetico, as they are rather expensive. Also, in general you need to be very careful with water softeners, as there are a lot of scammers out there with BS claims or **** quality.
If I was getting a water softener again, I’d be looking for Pentair or Fleck. From my experience I would prefer dual tanks, it’d have to be demand based, and needing 120 to run the controls would be fine.