I got a PO Box, thinking I'd be good checking a couple times a week, not having to worry about leaving something important in my mailbox.
Nope. In fact I was chastised for not checking it daily because it filled up in a day or two. Just about every piece was junk mail.
I asked them to only give me what is addressed to me directly (no cart sort, everyone gets this, crap). I was told legally they had to give me everything.
Funny thing is, I get mail for the previous two or three owners of the PO Box. USPS is legally required to give me mail that I am legally prohibited from opening.
My favorite? The box of 'adult toys' ordered by the previous box owner who, I can only guess, ordered while drunk, and forgot her new address.
I spent a couple days tracking her down, hoping that when I personally delivered the package she'd be so appreciative that ... Oh, never mind. She was way out of state, so I just wrote return to sender, and shipped it back to the sender.
Bottom line: USPS sucks.