OBTNL B11 GSM GPRS GPS Locator Anti-Lost Smart Watch Tracker for iOS / Android, Leather or Plastic B worth to buy? Thanks for it if those of you who have purchased OBTNL B11 GSM GPRS GPS Locator Anti-Lost Smart Watch Tracker for iOS / Android, Leather or Plastic B could share about what you think of the product. I would love any extra info, as it is quite pricey as $45.18 and I just want to know it is good before paying for it.