I ate here yesterday for lunch with a dining companion. Luckily we made it to the restaurant fairly early and were able to get a seat at the bar as this restaurant is tiny. There was not much decor to speak of but our seats right near the brick oven were awesome and allowed us to watch all of the food being made. The restaurant was lively and there was a whirl of activity in the kitchen to watch.
For lunch I had the Hula Burger while my dining companion had the Market Square Burger. We also split an order of their cheese fries. The Hula Burger was good with the burger cooked perfectly but most of my toppings fell off while trying to eat the burger. It all tasted pretty good although I wish it would have stayed together better. The beer fries were also good with better than normal fries and a very thick beer cheese sauce. They are definitely not your normal beer cheese fries. My dining partner said that the Market Square burger was good as well.
The bottom line for me is that the food was good here and the burgers tasted good. I wouldn't call it the best burger in Pittsburgh but they were definitely good. With all of that being said, I will probably head back in the future.