Happy to see this thread. We got our Instapark Betta in July of 2021 and had issues where it had to be sent back in Jan '22, Mar '22, Aug '22 and Nov '22. In the Aug '22 repair, they sent us a refurb unit, I believe it was a refurb Betta 2.0, an upgrade from our original order. Since that Nov '22 repair/replacement, no issues, the unit runs great, well into the night, sometimes all night in the summer. I sort of suspect it's slowing down a little but it could be my imagination.
For a unit that has had so many problems, their customer service has been excellent. I felt very much like I'm testing the product along with them early on, but they have made it right each time, so it just is what it is. I got the sense early on that we were overheating the batteries or maybe some other component, or perhaps water would seep into some component over a matter of 6-8 weeks. I should add that we use the unit very often: it was basically in the pool and running so long as the robot wasn't in there, no matter the season.
I was really desperate for a top-skimming robot because our built-in skimmer struggles to pick up the debris on the water (I've long suspected it's because of the older, smaller piping) and we get a lot of really small leaves and pollens in the pool, blowing in from wherever, tedious to skim manually. The Betta does a good job on these, and really makes the pool feel more "ready to go". If it disappeared tonight, I'd probably order a top-end SE and definitely the 3yr warranty tomorrow.