This shop hands down makes the best coffee in town. I was first introduced to Deidrichs in the Orange County area and fell in love with it. Their iced drinks are great with additional whip with chocolate shavings on top.
At some of the leading chains I've received plenty of crummy drinks that haven't been mixed or still icey, but Deidrichs is always perfection. I'lll go out of my way to go to this shop in any town. Try it and I think you'll convert over.