Being from Chicago, this museum automatically sparked my interest. The coolest part was seeing the original St Valentine's Day Massacre wall!
Museum was organized very well with lots of information. It was a little wordy though. Not too many artifacts. This caused a lot of people in a small cramped space trying to move around people reading the walls. This place is huge though- 3 floors! By the time I finished the second floor I was exhausted and just wanted it to be over.
I highly recommend it if you have the patience to spend 3 hours here!