Hello all....just purchased a treadmill that has this option....how does it really work and have u used it. Bought a Proform 4500 and it should be here in a couple weeks. This treadmill has a lot of bells and whistles better motivate me or nothing will! LOL. Never used this IFit tech. Or the Julian Michaels downloadable programs. I am 5'1" and hope I can customize these programs for the running/walking part....concerned because I don't want to start a program and find out the running part will start moving out and I will fly off the dang thing. LOL. I am 125 and want to lose about 15 pounds....hoping a treadmill like this will keep me motivated. I am excited about it. Stay tuned. If anyone has a treadmill like this, please drop mea line and tell me what u like or don't like about it. This even has Google maps where u can get a street view of most anywhere in the world and u can program your own routes and the incline adjusts to the terrain up or down. Too cool! Who knew treadmills could do this?