I dont have pics handy but our experience has been good 3 out of last 4 times. DD13 and I go there while DS and DW go to San Angel. It is a buffet meal with authentic German food. Lots of salad type items to choose from. Sausages with kraut, red cabbage, spietzel(I think thats how you spell it) chicken schnitzel(that is really good) and many other items. Then theres the dessert area. I usually am too full to really enjoy the desserts but when I have had them, MMMMMMM!
You set at tables with other people unless your crowd is big enough to occupy a whole table. Usually tables sit around 8 people. A band plays every hour German music. Make sure to see them, it is all part of the festiveness of this place.
I would go for dinner. There seems to be a bit more to choose from the buffet than at lunch.
Enjoy!