Most companies are OK but some are downright poor.
I ordered a book off Amazon. When it was delivered it was too a bit too big for the letterbox but that didn't stop them! They crammed it through so hard it took the inner letterbox cover off the door.
We also had a couple of knock and run merchants - one had the "Sorry you were out card" in his hand as he came up the drive!
Best one though was the man who delivered a crate of Italian wine and just left it at the front door of the wrong house and drove off. The neighbour made sure it went to the rightful owner though.