Avenue B is one of the originals in a wave of new American restaurants in Pittsburgh. They do a chalkboard menu, and a farm fresh rotating menu.
I've been twice, and I always make reservations on Opentable ahead of time. The food is always innovative (the last time we were there, we ordered waygu beef meatloaf), and it's usually pretty good. In terms of the dishes, there has been nothing that I've disliked, and nothing that I've absolutely loved to the point where I think about it.
The quality is consistently good, but again, nothing's knocked me over on my face aside from an amazing balsamic vinegar cheesecake! That was amazing and a standout dessert for me.
The setting is a bit more simple than a lot of the other new American restaurants, and the service is consistently good. I will be back when I'm in the Shadyside area!