It's a post office, so it's difficult to get too excited. This location, however, has something great going for it. It is the central post office for all of Phoenix, with a mail processing center situated next door. Take your package here and there's a chance you can shave a day off the time needed to deliver that package to the Midwest. Same possibility for First Class mail.
They have more experienced and friendly staffers here than at your average USPS location. The lines are usually short, although the likelihood of getting behind someone with an unique international mailing or a package in need of repacking seems greater here for some reason. On this day I experienced both, adding significantly to my wait even though I was third in line when I arrived.
Like most people, I don't go to the post office much any more, instead opting for package pickup and/or private delivery alternatives. And don't even mention letters. Visiting here is a little like traveling back in time.