I bought my first treadmill about 3 years ago. It was originally priced a little over $900.00. (I bought the floor model when the models changed for about $300.00 off.) I bought a proform, with the space saving design (where the deck folds up)
Within 3 month of having it, Sears had to come out on a service call to fix it. That held for about 2 months, and then I got into a repetative pattern of needeing service every two to three months. Needing service was a drag, it would take them about a week to come out, then they needed to order parts and come back.
I don't know if I just got a lemon, I know several people with the same brand who are happy with it. I just think that a treadmill in my house gets more use than in many other houses.
Everyone in my familly uses the treadmill at least once in a while.