one of the reasons why you won't find anything about sinowatches on here is that they don't take credit cards or paypal. They're WU or bank transfer only - which is a real easy way to lose your money if the dealer is less than 100% honest.
So, rather than being a walking attitude problem, why don't you read the site? If you'd actually read more than a handful of posts, you'd know that we use the dealers we use because we've bought a lot of watches between us - many of us have been collecting for years. Most of us have gotten ripped off at some point - so we've found dealers who are reliable, who supply the watches we see on their websites, who offer decent after-sales service. It ain't rocket science.
If you want to go it alone and use another dealer, please go ahead, but don't expect sympathy when it all goes wrong.