coros vertix gps adventure watch with pulse oximeter,titanium bazel/cover with sapphire glass dlc co worth to buy? Thanks for it if those of you who have purchased coros vertix gps adventure watch with pulse oximeter,titanium bazel/cover with sapphire glass dlc co could share about what you think of the product. I would love any extra info, as it is quite pricey as $709.89 and I just want to know it is good before paying for it.