I don't find John Mulaney to be all that funny, at least not in this. I haven't really seen much else that he has done, but "Kid Gorgeous" didn't really impress me much.
I laughed a few times, but that's kind of it, it was a few times, and the rest of the act was a little boring.
Maybe I just don't like stand-up films. But I was not interested except for a few hilarious moments.