I bought a reconditioned kickr'18. I got a few hundred hours of training out of it before it started making clunking noises and metal filings came out of it. Wahoo was pretty good and had another refurb trainer to my house in a week after they confirmed my old one was shipped. The new one has seen a couple hundred hours and it's been super quiet. The first one I got was loud out of the box which should have been something I probably could have had my unit replaced right away but whatever, wahoo hasn't been perfect but their support was fast and I'm still happy with my choice, especially since I went ahead and got the climb to go with it. I think it'd be hard to go wrong with any of the big brands, they all seem to have had problems of some kind but also seem to be doing okay at fixing them. At this point it might be down to what you can find for sale.