NO.1 G5 MTK2502 Heart Rate Monitor Bluetooth Smart Watch for Android iOS Golden worth to buy? Thanks for it if those of you who have purchased NO.1 G5 MTK2502 Heart Rate Monitor Bluetooth Smart Watch for Android iOS Golden could share about what you think of the product. I would love any extra info, as it is quite pricey as $50.00 and I just want to know it is good before paying for it.