I ordered once from China-Hifi-Audio.com, and it worked just fine. It was power amp and preamp. Fast response, fast and secure shipping, and yes, the shipping was very expensive. But I think it will cost at least as much if I ship an item with the same weight to China from US.
A few other audio items (a tube amp, cables, ...) from different merchants from China worked fine too. However, I had some problems with non-audio items purchased from China -- items never arrived or different items arrived, and ended up losing money.
A posting like this from a new user raises the questions though.