I can not comment on the actual travel service this office can provide, but I use their China Visa Service quite frequently. I usually drop off my passport and all necessary paperwork and they get it done expediently. To take advantage of this service is, of course, more expensive than driving up to the San Francisco embassy, but it is very convenient.
I have no complaints and would recommend them to anyone who wants to get a Chinese visa done and has no time to sit around at the embassy for a stamp in his passport.
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