It depends greatly on your location. Mine is very bad, I've lost maybe 10 packages over the past few years or so. Thankfully Amazon has been kind, but I worry I may eventually raise a flag there, even though I tell them constantly my local usps is trash.

The people in my post office are extremely rude and about as "I don't care" or "not my problem" as you can imagine. To be fair, I've also seen some extremely rude customers in the past too. From what I see, they are also very understaffed and probably under paid, but then again they have godly benefits and job security.