I haven't seen it yet, but I will say this unequivocally:
Any movie written by Aaron Sorkin and starring Michael Fassbender is a must see for me. They could make a movie about ... I don't, can't think of anything right now, but something completely boring and irrelevant. I'd be there. Sorkin's talent is off the charts. And the same goes for Fassbender. These guys are at the top of their professions for a very specific reason: They are amazing.