Dunkin' Donuts at 11250 Medlock Bridge Road #100, Johns Creek, Georgia.

Had an iced coffee there while visiting a friend. (9-20-17) Very, very bitter! Worst iced coffee I have ever had in my life! It tasted odd, like it was burnt or something. I have had this before at other locations, so I knew this was not right. Took it back, got a replacement drink, much better, and I said so. It was interesting that one of the young men working there found it amusing. Got sick a while later, throwing up, now I wonder if a prank of some sort was played on me, if it was, not funny! Called to discuss the issue with the manager, she was not there, poor response from staff addressing the issue.

Update, 9-26-17, so far no response from the manager, even though I was told she would call me concerning the issue. This has to be the worst Dunkin I've ever been to!