Knowing a lot of negative feedback about infopass, 本人带着充分的思想准备，(大不了皇帝不见), 抱着试探的心理, 去了趟旧金山Infopass.平生第一次来到如此壁垒森严的地方,第一印象可想而知.一再告诫自己: Be positive! Be objective! guess what? It did work to me! This is what I have learnt from my first infopass.
与政府部门打交道, 无论是移民局,领馆, 还是DMV, SSN, 等等, 其随机性和主观性太大啦. 换了不同的官员, 是否之差，黑白之分。 有的同学, 一次受挫,就打退堂鼓. 要有耐心, 不妨 try a few offices, try a few officers. Bear in mind your purpose is to get job done. no more, no less.
Also I found it very helpful if you can ask to talk to supervisor when needed.
Happy infopass!