I don't care that this is a chain restaurant, everything from the venue, to the food, to the waitresses screams authentic to me. The high ceilings, communal tables and benches, live German music make this spot ideal for a family out for lunch, or a group of friends looking to get sloshed and spanked on the butt (which they will do when you order a shot of schnapps, oh yeah!)
I've had German food, but not in Germany, so it would be quite difficult for me to review the meal. It boiled down to personal preferences for me.. I prefer my sauerkraut cold, not warm, and I prefer my schnitzel not to taste too.. "porky". So if you aren't a full-blooded Bavarian chap, I suggest you stick to the sausages and steaks. The apfelstrudel is really good with extra vanilla ice cream :)
P.S. If you you aren't feeling the communal main dining hall or the beautiful beer garten with blue skies, there's a tiny sports bar by the entrance where you can watch sports and still enjoy the bier.