for me it's about the same price as cab fare to and from the airport, so a bit expensive... but it's pittsburgh and public transportation would have taken about 3 hours to get home so what can I do...
I'd take a cab home if I had to, but cabs aren't so reliable about pick up from home to airport, and super shuttle is pretty good about being on time for pick up the few times my family has used it.
There's an app that tracks the location of your shuttle with your confirmation # - that's pretty convenient.