TLW B6 Fitness Tracker 0.96 inch TFT Screen Wristband Smart Bracelet, IP67 Waterproof, Support Sport worth to buy? Thanks for it if those of you who have purchased TLW B6 Fitness Tracker 0.96 inch TFT Screen Wristband Smart Bracelet, IP67 Waterproof, Support Sport could share about what you think of the product. I would love any extra info, as it is quite pricey as $28.90 and I just want to know it is good before paying for it.