I call it the Demon and say that machine is what powers the fires of hell......I can only do 25 min before I am bored out of my ever lovin mind....it took me forever to work up to 25...at first I could only do 5 min....I love love the treadmill and see quicker and better results with it. The owner/trainer at my gym is a Elliptical lover and pushes it on you.....................