We love this museum! The ticket/wristband is actually valid all day so we came back to finish looking at all three levels.
A lot of the exhibits were interactive or had some sort of multimedia aspect (audio/video) that engaged you.
My husband studied organized crime in college so this was very interesting for him as well as for me. Definite MUST for anyone visiting Las Vegas wanting to immerse themselves in some Vegas Mob history. However, they don't just limit their info to the Mob's Las Vegas connection. The whole exhibit is set up chronologically from the beginning of the mob to the present activities of organized crime. They even had an exhibit and video about El Chapo.
Bought the combo ticket with the Neon Sign Museum - I think its $30 per person and very well worth it!
Since the Neon Sign Museum has specific timed tour reservations we left the mob museum, went to the neon museum and then came back to finish our tour.