Sultra HRM W08 1.54 inch Tri-proof Smart Watch Phone, Support Bluetooth / Sleep Monitor / Anti-lost worth to buy? Thanks for it if those of you who have purchased Sultra HRM W08 1.54 inch Tri-proof Smart Watch Phone, Support Bluetooth / Sleep Monitor / Anti-lost could share about what you think of the product. I would love any extra info, as it is quite pricey as $85.34 and I just want to know it is good before paying for it.