This product was recommended to me by my trainer to get a more accurate calorie count and track my exercise. While it took a little studying of the manual, it has been useful in monitoring my progress in heart rate, calories and length of exercise. I'm actually enjoying using it and "competing" for my personal bests each visit. That it's coded to my monitor is a plus--several other people in the gym are wearing monitors as well. It's also useful in tracking heart rate and calorie count as I work the the weight machines and free weights--and a far more accurate count than the monitors on the ellipticals and treadmills. Worth the $'s spent if your serious about your workout.