Pretty much all of it. I walked away very content. I thought the actors had great chemistry and timing and the songs and script were consistently clever with an earnest tone.
What I didn't like
I think this iteration was perfect for Fringe. I could also see a version of this is a bigger production, with a bigger cast and stage. But that is just a merit to the show currently constructed.
My overall impression
Easy to enjoy. A coming of age story about one of the most famous for all the wrong reasons astronauts of all time. The dialog was tight, the actors performances all hit in the right spots and the songs maintained the same clever quip the script possessed.