We bought this exerciser at the suggestion of a physical therapist and, believe me, it gives your legs a workout while remaining seated! It took only about 5 minutes to assemble the unit (mount the legs and the pedals and you are done). It has a digital readout that displays time, RPM, revolutions, and calories burned (not sure how they know). And for the price, this is a bargain. As a senior citizen, I really think this is one of the best fitness items I own. Very happy!!