KuWFi Bluetooth 3.0/4.0 1.54" Resolution of 240x240 A9 Wristwatch Heart Rate Monitor for Sports Pedo worth to buy? Thanks for it if those of you who have purchased KuWFi Bluetooth 3.0/4.0 1.54" Resolution of 240x240 A9 Wristwatch Heart Rate Monitor for Sports Pedo could share about what you think of the product. I would love any extra info, as it is quite pricey as $69.90 and I just want to know it is good before paying for it.