This is a great product for people who have weak, chronic back problems. I had a treadmill and could not run and felt beat up after walking on it. With this elliptical I can run as fast as I can with no back pain afterwards! I wish I would have gotten this earlier. The long stride option was the deciding factor on why I bought this particular machine…. we looked long and hard and I tell you this is a great machine to purchase—I can run again! Thanks Octane for making the long stride option.