In spite of the dealers adjusting the track it moves from left to right at different speeds. At 1.5 it goes to the one side at 2 .5 moves to the other and at 3.5 moves back again. It's a concern as the track gets to be about ¼ inch from the side rail at the back. Got no help from Life Fitness, in spite of asking for it and the dealer advised when they called the technician at LF wasn't super helpful. Very poor customer service. It's a lot to spend to have a treadmill you are concerned the belt will be shredded and not help from the company. Would not recommend this TM or the company.