I use this machine for the best cardio workout ever. I plug in my ipod and go to work; Usually stay on for an hour, which burns an incredible 800 + calories. I tried getting the same results with other equipment, but came back to the eliptical trainer. I've raved about this machine to everyone that I know and have even considered investing in one for my househould. I cannot say enough wonderful things about the eliptical trainer....it's by far, in my opinion, THE BEST!