USPS tracking is useless. FIrst of it doesn't actually track the package.
All it tells you is if has left and if its been delivered, no where in between like FEDEX or UPS. Next is the worst voice routing system on the planet. Don't try and get a representative, that will cause undue stress in your life. No reason to waste time and frustration on anything except automated tracking, which if you read my first point, doesn't tell you anything anyway.
Its FEDEX and UPS from now on. At least those companies, while not perfect, as least make an effort.