[I'd give it a 2 1/2]
Whenever I visit Pittsburgh I make a point of visiting some location of Burgatory for the Bison Burger- haven't been disappointed yet! That being said I'm from DC and I'm not used to restaurants that: 1) don't take call ahead seating 2) have more than an hour long wait for just 2 people. At home, even very popular restaurants only have 50 min waits for groups of 6 or more (I speak from personal experience). And if it's the type of restaurant that would have that kind of wait for just 2 people, you can call ahead, even if it's a limited time in which you could do so- so you can use your wait time to travel and park for example.
It was not the normal dinner rush time and the only game a Pittsburgh team was playing at the time was hockey which no-one seemed to be watching, as only 1 tv actually had that game on. [It's also just the beginning of the season so people seem much more occupied with football than hockey at the moment]. Went to one location and decided we could not wait an hour or more, it was an unsure estimate we were given. So we called another location where they told us they couldn't take a call in reservation but we could download an app and get on the list that way- the wait was about 35 min. So we did that. Arrived and checked in. Still had to wait another hour? So why did we download the app?
The service was good and the food was good! This is the third time and third location I've been to of Burgatory and I very much intend to go again because I really love the food (the virgin espresso love shake is out of this world)! I just really don't know how I'm supposed to brace myself for potentially waiting more than an hour to be seated...They really, really, REALLY need to take call ahead seating.