According to this site the Ale is brewed in the old fashioned Belgian tradition, giving this brew an authentic Westeros flavor. You can use this to track down where the Ale is sold and hoard them all for yourself.
The only review I could find so far seems very positive. I will be posting my review once I’m able to obtain this sweet, sweet nectar of the gods. Hopefully I will find some soon so I can drink it during the season 3 premiere.