I purchased this elliptical machine brand new, a few years ago, to alternate with running. I have had other elliptical machines; however, this allows users to obtain a high level of perceived exertion when kept at a high resistance, 15 or 16, out of 20. The ability to adjust incline, benefits all muscles in the lower body, focusing on a few at a time if necessary. It is an added bonus if you do not hang onto the handle bars, giving you the ability to also use your inner core muscles for balance. Yes it is expensive, but if you are one who really works out hard and consistently, it is worth the price.