Hamoery E18 Smart Bracelet True Color Screen Pedometer GPS Track Continuous Heart Rate Sport Smart W worth to buy? Thanks for it if those of you who have purchased Hamoery E18 Smart Bracelet True Color Screen Pedometer GPS Track Continuous Heart Rate Sport Smart W could share about what you think of the product. I would love any extra info, as it is quite pricey as $89.99 and I just want to know it is good before paying for it.