I keep returning to the Auslander because it's a fun place to eat. I can't say that the food is fantastic, or that it compares favorably to real German food (i.e., meals I've eaten in Germany).
Still, there are some very good dishes on the menu. I recently tried their schnitzel sandwich - it was surprisingly delicious and flavorful.
But the real draws to the Auslander are the friendly waitresses, homey décor, and excellent downtown location. If you're shopping in Fredericksburg, you won't regret stopping here.
(On a side note, I'm not a beer drinker, but my friends say the beers here are great.)