Visiting on Saturday mornings usually means no wait at the USPS.
Weekdays may have longer lines, especially during lunch hours.
Bring your own packaging supplies for mailing, as they may not be provided.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.