I was in Vegas for a bachelorette party and since the bride is a huge mob movie fan, we thought this would be a great surprise for her.
We had a fantastic time and loved the interactive aspect of it, even though we got whacked. I plan to go again until I get made! (Other options were getting arrested or going into witness protection!)
My friend who organized did get us 2 for 1 tickets so for $15 per person this was completely worth it. $30 per person is pretty pricey, I'll probably look around for discounts when I go again.
As others have said, there is a lot of reading so be sure to give yourself plenty of time to get through everything.