I have visited this place at least a dozen times over the years and it never disappoints. This restaurant has been serving bratwurst since 1313 at this location. I recommend going for lunch where you sit snugly at communal tables.
I've read other reviews saying it was too touristy and rushed for dinner. This is not the place to go for a leisurely, quiet dinner--NO, this place is packed with tons of tourists and YES, locals. It's a whirl of activity: the huge grill in the center is flaming & smoking the tiny bratwurst over beech wood, the taps continually flow with delicious beer, the wait staff (wearing traditional trachten) are efficiently delivering piping hot pewter plates of Franconian (the region) fare.
There is a bread/pretzel basket on the table, you may help yourself--they will ask you if had bread, then charge you for the pieces. This is common practice throughout Germany.
Go for the food, go for the atmosphere, go for the history, just GO!