I purchased this watch at my local running store and returned it with 2 weeks. It was very inconsistent in keeping its connection with the chest strap. I tried new batreries in both the watch and strap, that didn't help. Maybe mine was just a bad apple, but it was certainly not worth the $ I paid for it.Another thing I didn't like was that it didn't have a separate way to track your activity time only, like a stop watch. I would have liked to see a split screen with your time and heart rate at the same time instead of having to swap between the two. I never could figure out how to input my weight and height to get an accurate calories burned reading.Overall I was just plain disappointed in this watch. I guess I'll be spending my money on a Garmin next time.