Amazfit T-Rex Smartwatch, Military Standard Certified, Tough Body, GPS, 20-Day Battery Life, 1.3'' A worth to buy? Thanks for it if those of you who have purchased Amazfit T-Rex Smartwatch, Military Standard Certified, Tough Body, GPS, 20-Day Battery Life, 1.3'' A could share about what you think of the product. I would love any extra info, as it is quite pricey as $139.99 and I just want to know it is good before paying for it.