Outdoor Sport Smartband Bluetooth 4.0 Heart Rate Monitor Actively Fitness Tracker Sleep Smart Bracel worth to buy? Thanks for it if those of you who have purchased Outdoor Sport Smartband Bluetooth 4.0 Heart Rate Monitor Actively Fitness Tracker Sleep Smart Bracel could share about what you think of the product. I would love any extra info, as it is quite pricey as $29.29 and I just want to know it is good before paying for it.