I'm not sure what they do, but if they have a program where you are walking along a path or enjoying scenery,I would love it. I hate walking on my treadmill and this would be great for that. I bought a DVD a few years ago that I put in my little DVD player.Rigged it up as close as I could to the treadmill., it was filmed in a park in the state of Maine. It was really neat.sound affects also. Birds singing,etc. but I still was aware of my dismal surroundings. My treadmill is in the basement. No TV down there either. Yes,they are expensive.