Both of the previous reviewers are correct, actually. Yes, there can be a line to the door at times, and not everyone working there is 100% nice 100% of the time. But who is? And, once you get to know them -- and are courageous enough to give them the benefit of the doubt -- everyone working there is very cool to deal with.
Because this Post Office is tucked way back in the Foothills, it's not staffed as heavily as I've seen some others. But the remoteness of the location also means you get to breeze in and out on rare occasions too (seeing as this is too far out of the way for any non-Foothills residents). So, do like me: never go here in a hurry; be polite; be patient (it's not all about you). And you'll see this is really no worse than any other Post Office...and maybe even a little bit better.