Been in here a few times and generally speaking it's a good location. The help here is actually helpful (and courteous!) especially with questions regarding postal stuff like stamps and streets and addresses.
The counter people do a really good job of getting folks in and out quickly. Those couple questions they ask as you're fixing to leave aren't just to separate you from your money, they are memory prods because minds wander while standing on queue.
Please try to have your packages in order and save the unhappy rants for social media. Practice small talk and other social skills if there's a line. It's the post office, try to make it funner for everyone.