I've had the 14.0 for about 7 years now...It's still working like new. I'm NOT a daily exerciser anymore...just trying to stay in shape at least some...with 2 kids, fulltime job and house keeping...there's little time. This is just what I've needed though. I can choose to push myself by running, and the incline is just enough.... Perfect if you're not sure if its going to end up being be a doorstop.