GREAT REVIEWS! I wish I had seen these reviews before buying a BodyMedia Link. They claim mine will read heart rate, but only if You have a $75 heart strap AND a $300 Garmin GPS with You!I can say it has changed the way I view my sleep, and the way I view my activity level. I weigh over 300 lbs, but still burn 4200+ calories just working and existing every day.I wonder if "fitness" is the right category. Perhaps either "cyborg" or "tricorder" would be an improvement?