Got the FPs done today too.
The lady at front was friendly. She pointed out that we were early but let us go in anyway. There wasn't many people in the afternoon (went in at around 2:15). My impression is that if they are not busy, they wouldn't mind if you go early. There was 7 cases before us and only 3-4 after us. After 3PM, the place is basically empty. For the benefit of those who are going in the future, here is what I found out from the lady at the front:
* They open from 8:00AM to 3:45PM Tuesday to Saturday.
* Saturdays are the busiest days, Tuesdays are crowded too. (They had more than 300 people today, but the majority of them came in the morning. The place was so crowded in the morning that some people had to wait in line outside of the building.)
* Early FPs seem to be okay as long as there aren't many people. It doesn't seem that you have much explaining to do.
* The lady does not understand why most people come in the morning and wait for hours whereas there are only a few people in the afternoon.