G20 1.3 inch TFT Color Screen Smart Bracelet IP67 Waterproof, Support Call Reminder/ Heart Rate Moni worth to buy? Thanks for it if those of you who have purchased G20 1.3 inch TFT Color Screen Smart Bracelet IP67 Waterproof, Support Call Reminder/ Heart Rate Moni could share about what you think of the product. I would love any extra info, as it is quite pricey as $28.20 and I just want to know it is good before paying for it.