Z21 Plus 0.96 inch TFT LCD Color Screen Smart Bracelet IP68 Waterproof, Support Call Reminder/ Heart worth to buy? Thanks for it if those of you who have purchased Z21 Plus 0.96 inch TFT LCD Color Screen Smart Bracelet IP68 Waterproof, Support Call Reminder/ Heart could share about what you think of the product. I would love any extra info, as it is quite pricey as $32.40 and I just want to know it is good before paying for it.