I purchased this model initially last spring because of many factors. One I have lots of joint issues and lower back problems, so treadmills, elliptical machines, etc. really bother them. Two I am overweight, so walking even sometimes strains my back. I use the machine 5-6x a week for 25 minutes and the work out is fun, amazing, and burns lots of calories. It is truly one of the few exercises that engages the bulk of you muscle groups at once. My only complaint is both bolts that support that row arms broke apart, and the about a week ago the piston underneath came apart as well. Not sure if it is because of overuse or just that quality of the material. Either way I was satisfied enough to purchase the same model.