I whole heartedly disagree with anyone knocking Alvin Chee as a "middle man who adds no value".
He is one of the few middle men who has added tremendous value to me in the past. He is the one who set up US repair for Denafrips products, who instituted the 3 year transferrable warranty, who pushed for firmware updates, who created the videos on how to upgrade firmware and components , who has answered any and all emails requesting information/recommendations, and who fought hard to not have the never ending naming convention that was driving resale prices down.
He fought for those of us who own Denafrips products, and apparently lost. I have owned a bunch of Denafrips products (DACs, DDCs, amps, preamps; all purchased through Vinshine. Also LHY linear power supplies, and several friends with the Jay's CDT2 MKIII transports.
I will absolutely continue to follow Vinshine and Alvin, and have absolutely NO qualms about buying from him. What can be better than having a reliable partner for Chinese hi-fi, that stands behind them with integrity.