First of all it's Precor vs. Smooth. Enough said. Precor is the #1 provider of fitness equipment to Lifetime Fitness, YMCA's, Golds Gym, 24 Hour Fitness, etc. Smooth, can't be found in any of those places and there's a reason why. The quality of the machine and the bio-mechanics (the way the machine work's with you) can't even come close to what a Precor has to offer. The Precor AMT (Adaptive Motion Trainer) allows you to do just that...Alter "your" stride/motion throughout your workout. You will move the way that you're designed to move on this machine. Not move the way someone at Smooth wants you to move. Rule of thumb...If there is a place on the review sight that you're looking at that has you "Click here to buy"...it's not an objective review.