S3 0.96 inches OLED Color Screen Smart Bracelet IP68 Waterproof, Support Call Reminder / Heart Rate worth to buy? Thanks for it if those of you who have purchased S3 0.96 inches OLED Color Screen Smart Bracelet IP68 Waterproof, Support Call Reminder / Heart Rate 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.