Just had my interview today and got recommended for approval.
People are really nice and efficient there.
I would just recommend you go at least 30/45min prior to your interview time. I know it says do not come too early on the letter but I got there 40min prior and there were a huge line to enter the building. Most people were not there for naturalization since the waiting room on the 2nd floor was almost empty. Also, make sure you enter on Sansome St and not Washington St. (both entrance had huge lines, I went to the one listed on my interview notice).