I am a bit spoiled by the tracking systems of UPS and FedEx which state when and where a package is received by an interim facility. Then the systems let you know when the package is shipped forward and where it lands, next. The USPS provides less information: when they have the package and when the recipient does.
I have only lost one package after shipping. It was a knife sent back to Cutco for resharpening. Luckily I had insured the package and asked for delivery confirmation. So it really wasn't the post office who lost the package. Cutco did.
They sent me a brand new replacement . . .