S226 1.3 inches Sport Smart Bracelet IP67 Waterproof,Support Heart Rate/Blood Pressure Monitoring /S worth to buy? Thanks for it if those of you who have purchased S226 1.3 inches Sport Smart Bracelet IP67 Waterproof,Support Heart Rate/Blood Pressure Monitoring /S could share about what you think of the product. I would love any extra info, as it is quite pricey as $27.20 and I just want to know it is good before paying for it.