Outstanding museum. I thought it was well worth the $20 admission charge. Even better if you qualify for 1 of the discounts. If you're a fact and detail nerd like me, you could easily spend a half day here digesting everything. The staff is great, especially the funny guy at the beginning of the tour who drops a bunch of mob jokes. He alone made the tour for me within the first 5 minutes. You go at your own pace. They have little alcoves throughout the tour that show movies and it's interactive throughout.
Prior reviews have said that the museum glorifies mob history. That's probably true a little. I wouldn't take young kids here, but for teenagers and impressionable minds, perhaps a morality tale can be woven into the visit? A life of crime usually works out bad in the end. Loved the gift shop too. Superb!