The primary reason I would only give the commoner three stars is because of the price. The atmosphere is good, the service is acceptable but not great (if the service was stellar it might justify the high prices a bit more).
I came by for lunch with two friends and they did a great job getting the food out quickly so we could all be back at work within the hour. I chose the grilled cheese and tomato bisque and my friends had the vegetable sandwich and the chicken salad sandwich. We all went with pretty basic menu items and we were all pleased with our meal. However, $12 is steep for a pretty basic grilled cheese and soup in my opinion. Heck -- there's not even any meat in the dish!
I considered getting the burger -- but at nearly $20 its definitely not in my "lunch" price range.
I've said it in a number of ways -- it's overpriced. It's trying to be something it's not with the prices. I would come back more often if it was just a bit more realistic.