DiDO S3A 0.96 inch IP67 Waterproof Smartwatch, Support Sleep Monitoring / Pedometer (Gold) worth to buy? Thanks for it if those of you who have purchased DiDO S3A 0.96 inch IP67 Waterproof Smartwatch, Support Sleep Monitoring / Pedometer (Gold) could share about what you think of the product. I would love any extra info, as it is quite pricey as $52.10 and I just want to know it is good before paying for it.