Amazfit GTR Smartwatch with GPS+GLONASS, All-Day Heart Rate Monitor, Daily Activity Tracker Rate and worth to buy? Thanks for it if those of you who have purchased Amazfit GTR Smartwatch with GPS+GLONASS, All-Day Heart Rate Monitor, Daily Activity Tracker Rate and could share about what you think of the product. I would love any extra info, as it is quite pricey as $179.99 and I just want to know it is good before paying for it.