The post office is one of those places that you just don't go to when you are short on time...kind of like the DMV. There are always only two people working the counter. Depending on the needs of the other patrons, your wait time could be long. Someone has come out from the back on the last two trips I have made here to help customers who where there to only pick up packages or vacation mail, but not for money transactions. This kept the line down a little bit.
The staff is really nice and always has stickers to hand out to the children. The parking lot is also easy to access but don't be surprised if you get stuck behind someone trying to make a left onto University (there is a no left turn sign).