Plus MTK6739 Quad Core 4G Smart Watch 16GB Rom Android 7.1 Smartwatch Heart Rate Monitor GPS Wifi Bl worth to buy? Thanks for it if those of you who have purchased Plus MTK6739 Quad Core 4G Smart Watch 16GB Rom Android 7.1 Smartwatch Heart Rate Monitor GPS Wifi Bl could share about what you think of the product. I would love any extra info, as it is quite pricey as $150.93 and I just want to know it is good before paying for it.