Was here for the G20 last week.
Maybe it's just a reflection on Pittsburgh (and other nonDC cities) that the service here was really good, and the people were extremely nice! Our waiter definitely answered more than his fair share of questions (what comes on the waffles? caramel you say!). No problem getting water and coffee refills (we needed both for sure). And of course they'll call a cab for you while you settle the bill because it's raining. :)
The eggs and bacon in my "The Morning After" special were your standard diner fare...but the HOTCAKES. OMG they were so good. I swear they are cooked in bacon grease or something, and the perimeter of them is edged in crispy goodness 2 inches in. And I only got the plain ones (come with butter, and you can add syrup). Other tablemates got strawberries (sugar added) and banana (sugar not added, so less sweet).
Decor is 1950s nostalgic B&W photographs posted everywhere. Classic diner tables and chairs.
Great way to end a trip to Pittsburgh. Doesn't hurt that FLOTUS, POTUS, and the Japanese prime minister ate here either.