A bad mini golf course is a real bummer. You know the kind I'm talking about: The ones with 18 holes of differently-shaped wooden frames with no variation other than the shape of the hole (a place in Monroeville comes to mind...) Kistler is definitely NOT a bummer.
The price isn't bad, the variation of different holes is challenging, but not infuriating, which is the right mix. There's even a hole where you have to hit the ball into a stream, and it flows down to the next part of the hole! Pretty cool.
Kistler's is a bit out of the way for a Pittsburgher, but if you live in the eastern suburbs, it's definitely worth checking out.