Considering my affinity for the post office is akin to a root canal, a four-star review is sayin' something!
I have a PO box here, and upon sign-up, the customer service agent took me to the box to 1) show me where it was in the rows upon rows of boxes, and 2) to make sure I, with my small stature, could reach it on the top row. Much appreciated. I occasionally get mail for the apparent last owner of my PO box, and that appears fairly normal considering the random other pieces of mail sitting out. They SHOULD have a PO box reject mail drop because it appears most people are just throwing that stuff away...
For regular PO use, expect long, but decently fast moving lines at busy times.