Hi, anyone has any experience with fitness trackers - wristbands? I saw an add somewhere on Facebook or where and in the name of procrastination searched for more info. It looks like a very interesting device - monitoring the heart rate, sleep, calories burnt, even GPS with some to measure distance walked/ran/biked. Etc. It also looks like something that could help a lot with motivation to move. Does anyone have any experience? Do you think it is worth considering getting one?