IP67 waterproof smart watch, with Bluetooth 5.0 sports mode, smart watch with heart rate monitoring worth to buy? Thanks for it if those of you who have purchased IP67 waterproof smart watch, with Bluetooth 5.0 sports mode, smart watch with heart rate monitoring could share about what you think of the product. I would love any extra info, as it is quite pricey as $53.99 and I just want to know it is good before paying for it.