It's pretty rare you can call a stand-up special "powerful", but I wouldn't hesitate to call either of the Birbiglia specials I've seen just that. He has a way of telling stories in a roundabout, disconnected manner and guiding them all to the same place at the very end; tied together loosely with a common theme. My Girlfriend's Boyfriend is about sad-sack love; and the compromises Birbiglia learned to make and not to make as he's matured. Towards the end, he comes to a final, resounding conclusion that really wraps the special up perfectly...he has a way of telling these unremarkable stories in such a concise, inclusive way. He doesn't end his stories where most would, he often fixates on some mundane, trivial bit at the very end that unexpectedly enriches the story as a whole. This guy's good...really good. Certainly, as I said in my write-up on his other special, a contemporary great.