Fitness Trackers, Smart Watch with Heart Rate Monitor Step Calorie Counter Sleep Monitor ,1.3" TFT C worth to buy? Thanks for it if those of you who have purchased Fitness Trackers, Smart Watch with Heart Rate Monitor Step Calorie Counter Sleep Monitor ,1.3" TFT C could share about what you think of the product. I would love any extra info, as it is quite pricey as $36.99 and I just want to know it is good before paying for it.