A strong showing from a strong beer. If you want to get really heady about it I'm sure the reviews at Beer Advocate will fill you in. If you're looking for a non-traditional review, I'll give it to you in haiku form...
Very nice flavor.
St. Bernardus Christmas Ale.
Share one with some friends.
Boom. How do you like me now? Okay, okay. Really nice tickle-your-tongue carbonation. Fruity and deceptively smooth for a 10% beer. Tread lightly - it's a dangerous one...but oh so good.