AMAZING! Went there with a bunch of friends and had a great time. We were 20 minutes late and felt really bad about holding up the table, but they were very gracious and seated us all and didn't hurry us. I ordered the 8 oz filet and it was cooked a perfect medium rare. Really the best steak I've had in years and definitely the best in Madison. Yummy sides, too. The service was top notch -- from the bartender to our waiter to the food runners.
It doesn't look like much from the outside, but don't be fooled. Inside the bar and the dining rooms are pretty nice. Good lighting, lively atmosphere.
It's expensive, but TOTALLY worth it.