This was my 3rd trip to this post office and I have to say that they're as good as a USPS can get. I went there Thursday morning at 10 and there was no line. I went to the front of the line with my 3 packages and I needed to know which boxes to use. The guy weighed everything and told me exactly how much and his recommendation on the boxes. I told him I needed to fill everything out and by then, there was a line of maybe 4 people, so I'll go to the end and wait. He told me I could just fill it out and then go back to the front of the line. I was in & out without any wait time and I actually charged the correct amount of shipping (rather than me getting screwed) on eBay for once!
One time, I came here at 12 noon near Christmas time. There wasn't even a parking space, so I booked it. My recommendation: avoid first opening, lunch, and closing if you can.