Kospet Optimus 4G 2GB+16GB MT6739 IP67 Waterproof 1.39-inch Ceramic bezel Smart Watch with Detachabl worth to buy? Thanks for it if those of you who have purchased Kospet Optimus 4G 2GB+16GB MT6739 IP67 Waterproof 1.39-inch Ceramic bezel Smart Watch with Detachabl could share about what you think of the product. I would love any extra info, as it is quite pricey as $220.88 and I just want to know it is good before paying for it.