Everyone, well most everyone, loves working out on the elliptical. It provides a great cardio workout and is kind on your knees. To make the most of your workout, make sure you are keeping your strides per minute is a challenging zone. Strides per minute is the number of times your legs go around and the elliptical tracks this statistic for you — how great is that. Aim to keep your strides per minute in between 140 and 160. If you're doing intervals on the elliptical, make sure your "sprints" are closer to 160 than 140.
The motion of the elliptical is so smooth and meditative, you need remember to push yourself. Strides per minute is just the number to motivate you. This is one of the reasons I think covering up the display on cardio machines is detrimental to an effective workout.