J10 1.44 inch IPS 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 J10 1.44 inch IPS 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 $20.70 and I just want to know it is good before paying for it.