Pro Form 520i
Great treadmill, except if you plan on using it for longer than 5 months. I wouldn't even say I used it excessively (max 25 miles per week) and the belt would not move with a human on it. I tried tightening it and loosening it as well as lubricating it.... I am so mad because I spent good money to have it for winter, and that's the only thing I got, ONE WINTER.