I came here as I bought too much stuff from my convention and needed to mail it to myself. This USPS is in Terminal 1 and there are signs leading you there, you cannot miss it. The staff there was really helpful and friendly. He figured the cheapest price to mail my things, He also didnt force me to buy a $6 roll of tape like other USPS locations have made me do, just to tape my package closed! This USPS has weird hours, so double check. This was much cheaper and easier to mail my stuff than going through my hotel or FedEx - and a very pleasant experience.
Nice employees, but the hours of operation were never convenient. I had to cancelled my post office box.