This is absolutely the best piece of exercise equipment I've purchased. Don't let the low price fool you. It has a solid frame and sturdy walking surface. It's exactly what I wanted. I used to have a big (expensive) electric treadmill, but I didn't appreciate the bulkiness and the difficulty I had manuevering it around when I wanted to store it. With the Sunny Manual Folding Treadmill the storing is a piece of cake. Moreover, I get just as much of a workout with this than I did with the electric one I had. Actually, this workout might even be a little better because of the natural incline that it has.