This is a great value if you really take advantage of all if the exhibits that they have to offer. I did read many reviews ahead of time and figured that it would be a small themed museum that you could spin through in 45 minutes to a hour- WRONG!!
When we got there the friendly staff informed us that we should allow about 3 hours. "Yeah, right", I thought, "I'm not that into this stuff! How can there be that much to see?!" I was mistaken!
They have done a great job of presenting a wide variety of exhibits that address the different aspects of organized crime (the most notorious mobsters, women who were involved with the business, children who grew up around this lifestyle, the impact organized crime had on Vegas, etc). There are so many topics that they cover and they really offer some very interesting interactive exhibits that keep you more engaged than just a wall of information and pictures.
I actually short changed myself at this museum because I planned poorly and went before lunchtime. After about 3 hours we were so hungry that we had to finish our tour so we wouldn't waste away for hunger. I wish that I had planned better so we could have stayed another hour or so to be able to finish up all the exhibits at the pace that we had been going. We found it very engaging and I was surprised to know how interested I ended up being in Mob history!