I order all my stuff from US vendors. It's not that I have anything against the vendors in China, but I know that I can get stuff faster if I order from US vendors. I have ordered from many US vendors, but for most stuff I go to the west coast vendors. I guess I'm just not very patient and I want my stuff ASAP.
I don't know if the China vendors do this, but most of the places I order from always throw in some little freebies as well. Nhaler has sent me a few nice little tools and they even upgraded a 6ml sample bottle of juice to a 30ml bottle. Other vendors have given me free batteries, little storage cases and a few other goodies.