powerwatch pw07 2, body heat powered fitness tracker smart watch, 200m dive, gps, calorie and step c worth to buy? Thanks for it if those of you who have purchased powerwatch pw07 2, body heat powered fitness tracker smart watch, 200m dive, gps, calorie and step c could share about what you think of the product. I would love any extra info, as it is quite pricey as $707.95 and I just want to know it is good before paying for it.