I have an original Direto. Belt started failing a bit after about a year. Seemed like a belt tension problem at first. Adjusted the tension back to spec, then that didn’t last long before feeling like it was off again. Found out the belt was literally pulling apart, and had a replacement part sent out. It’s been fine since, though I’m now unsure if it’ll happen again or not.
Support was good about letting me know what to do, and sent parts out quickly once we identified the problem. It’s not particularly complex inside the unit, so it wasn’t that hard to swap out parts. I will add that one of the tension screws has a specific torque value that you’re instructed to set things to. What I found most annoying about the whole process was that screw was recessed on the side of the unit, and there was just enough room around the screw to fit my Allen wrench next to the screw. It was set back a good bit, so it was a pain to actually get onto the screw, instead of next to it. And that I had to do that multiple times if/when the belt tension was reporting out of spec, while adjusting the unit until tension was reporting that it was spot on again.
This was doing somewhere between 300-400 tss average over that time. So not a ton of volume, but it did get used regularly. And I’m not a sprinter, so my efforts were rarely going over VO2max power.
It works well otherwise. And its quiet, if that matters to you. My fans make much more noise than the trainer does.