DT58 1.14 inch TFT/IPS Color Screen Smart Bracelet IP68 Waterproof, Support Heart Rate Monitoring / worth to buy? Thanks for it if those of you who have purchased DT58 1.14 inch TFT/IPS Color Screen Smart Bracelet IP68 Waterproof, Support Heart Rate Monitoring / could share about what you think of the product. I would love any extra info, as it is quite pricey as $31.00 and I just want to know it is good before paying for it.