If you have the occasion to hear the Vienna Boys' Choir, do it! However, realize that you are paying $27 to go to Catholic Mass. In another language, no less. Since I am not Catholic, the traditions are already unfamiliar and thus I didn't feel that much more out of place than at masses held in English. Anyway, the choir was pretty good - extra entertainment lied in the choirboy with ADD (attention-deficit disorder), who couldn't stand still or look in one place for more than five seconds. He was a riot, and even people that weren't sitting near me knew who I was talking about after I mentioned it.