When it first arrived at my table, the two beers were almost completely separate. The Guinness stayed on top of the glass, with a layer of Magic Hat #9 underneath. I decided to stir it up, just for fun.
The combo is interesting. You get the apricot aroma of Magic Hat #9 with all the bitterness of Guinness. Drinkable, but not a favorite. Leaves quite a bit of lacing in the glass, which dissipates only very slowly.
IBU: (probably about the same as Guinness)
My rating: 3/5