This this the only downtown Las Vegas Post Office, so you will find a mixture of tourists, Vets, Office Workers, and the occasional colorful, and fragrant character.
The building has been there longer that most have been alive, so it's extremely vintage for sure. The staff is friendly and great, but it is under-staffed and it could get frustrating is you are in a hurry..
So if you are in a hurry!
Like a Jedi might say: This is not the post office you are looking for !
When it is slow, you will love the witty banter the locals have with the staff, and it makes for great people watching.
They are almost always out of the latest stamps and supplies, so keep that in mind.