DiDO G23 0.96 inch IP67 Waterproof Bluetooth 4.0 Smartwatch, Support Blood Pressure Monitoring / Sle worth to buy? Thanks for it if those of you who have purchased DiDO G23 0.96 inch IP67 Waterproof Bluetooth 4.0 Smartwatch, Support Blood Pressure Monitoring / Sle could share about what you think of the product. I would love any extra info, as it is quite pricey as $80.99 and I just want to know it is good before paying for it.