This past summer @bhsalzer and @akalsey and I (@dkworldwide) were brewing a double batch. We got a few growlers for a change and they were a huge hit. We liked the idea of going to a party with a larger single bottle, like bringing a bottle of wine. The addition of the GrogTag Labels had people asking, "Where did you buy this?" Of course we told them, "We made it." They were blown away.
One tip - like a bottle of wine, let the beer get some air before serving. The science is slightly different for the growler apparently. We'll just have to make more and keep experimenting.