I still exclusively use USPS.
And overall, they've done exceptionally well for me.
* Here's a pet peeve though...
Everyone knows that USPS has been experiencing some difficulties lately.
So my pet peeve is the fact that a couple of companies I've purchased from recently opted to hold onto my order (and my cash) for a few days before turning it over to USPS.
REALLY .... So the fact that my package may be held up in the mail isn't bad enough??
... You've decided to hold it up before it ever got to them.
.. Rant over. LOL
*Of course I'm not referring to Apex-Alchemy, who Always gets it in the mail ASAP.