The only thing I get every week is the milk. Yes, you can get it at Harris Teeter ... but at my HT at least, stock levels can be spotty, so I prefer to have it delivered. And it was always kind of a pain at HT to return the bottles, had to make a separate stop at the customer service counter.
Things I add on sometimes: heavy cream, buttermilk, a produce bag, eggs, bread. All very good.