Get the "large" beer. You basically have to and it will be worth it. Baked camembert and bratwurst are both delicious. Definitely sit outside if you can snag a table.
Get there early as they get pretty packed. Oh, and if you can go for Oktoberfest, then definitely make the trip, get some beers and dance on the tables!
If you are a homesick German guy you definitely should visit this venue. Eat one of the delicious pork shanks and gulp a Hefeweizen and you'll getting better in no time.
Mulled wine warms your belly almost as quickly as the Aventinus ice bock* *beware the ice bock. Twice as strong as Aventinus double bock. Tastes like whiskey!