USPS is the worst when it comes to package deliveries, their tracking system is pretty much useless, and it's hard to pinpoint who's going to deliver your package. Is it gonna be your normal postman or a postal worker from another location?
Anytime I order from Amazon, Walmart, Nike, etc, I always pray

that they don't choose USPS as the shipper because I always gotta take the day off from work and get up early sitting at the window all day just to see when the van pulls up. After all, if nobody's home, unlike UPS, FedEx, or Amazon's delivery drivers, USPS won't leave your package, and it becomes a hassle traveling to the post office, although luckily for me, I only live down the street from the location, or worse if they try to deliver the next day, which adds more inconvenience.