Smart Watch, Health and Fitness Smartwatch with Heart Rate Blood Pressure SpO2 Monitor Sleep Tracker worth to buy? Thanks for it if those of you who have purchased Smart Watch, Health and Fitness Smartwatch with Heart Rate Blood Pressure SpO2 Monitor Sleep Tracker could share about what you think of the product. I would love any extra info, as it is quite pricey as $114.99 and I just want to know it is good before paying for it.