F10 0.96 inch TFT Color Screen Smart Bracelet IP67 Waterproof, Support Call Reminder/ Heart Rate Mon worth to buy? Thanks for it if those of you who have purchased F10 0.96 inch TFT Color Screen Smart Bracelet IP67 Waterproof, Support Call Reminder/ Heart Rate Mon could share about what you think of the product. I would love any extra info, as it is quite pricey as $34.50 and I just want to know it is good before paying for it.