Monkey Boy is absolutely one of my top ten beers. Put down your Blue Moon, and drink this instead. If you like Bells Oberon, Monkey Boy will be your jam. I have yet to try a bad beer from here. Monkey's Uncle, Bigger Hop, Gratitude, Snow Melt--all great.
At both the brewery and at Pgh Public Mart, the staff has been exceptionally polite and friendly. They are genuinely into beer and talk your ear off--in a good way--if you have questions.
The brewery itself is pretty cool in that it's not trying too hard to be hip. It's focused on the beer, with absolutely no gimmicks. It's a great place to hang around and sample something new--there are about ten beers on tap at any given moment and they change seasonally.