If you've never tried the Old Fashioned, you must do so ASAP.
First thing's first: Try the cheese curds. Best you'll ever have. It's not just about the beer battered cheese curds themselves, but about the amazing dipping sauce that comes with them. Simply awesome.
Everything I've ever gotten there was really good and quite reasonably priced. Good size portions that will either fill you up and/or leave you with a to-go box.
I'm not much of a drinker, so I can't really say anything about their bar. However, from the looks of it, it seems to be well stocked with a variety of alcohol to meet everyone's drinking needs.
The only possible downside to The Old Fashioned is the wait. Often there is a bit of a wait to be seated. I've only had to wait 15 minutes or so, but I've only ever gone at lunch time. I'm assuming dinner could get pretty crazy.
If your looking for a good place that serves an awesome burger/salad/sandwhich and some KILLER cheese curds, look no further.