I fly in and out of Pittsburgh quite a bit and have always been impressed with the speed and efficiency of the Pittsburgh International Airport. Unbeknown to most, there is another security checkpoint upstairs that is always faster than the one on the ground level. The tram that takes you from security to the terminals is quick. Gate agents and other employees are nice enough, although I have not often had to deal with them because flights are on time (with American).
There are good food options in the small food court so you should be able to find what you need for a quick meal. If you want a sit down restaurant there are those as well. For cocktails, there is Martini's, which I have been to a couple of times--they also serve food.
I give it a four star because it could use a slight update, but other than that it is a wonderful airport.