This exhibit was so cool! We did this as part of a pick 3 for $60 MGM deal. It is worth it because then there is no wait to get in. You just show your tickets and enter.
When you enter the exhibit they give you a "boarding pass" which tells you briefly about a real passenger on the titanic. At the end of the exhibit you look for your "name" on the wall to see if you survived the journey. So you enter the exhibit and it starts by telling you about how they built it and then you enter the ship! You walk through the third class cabins, second and first class cabins, a ship hallway, an "outside" deck, and the main stair case. It's all very cool and very well done. Then the exhibit talks about hitting the iceberg and the efforts to find the ship an recover objects. The last room you go through is the room that has a large piece of the hull. It's very cool and kind of haunting.
Overall this is a very well done exhibit that takes about 2-ish hours to walk through. Don't get the audio tour, you don't need it. This exhibit is worth seeing before it possibly ends in 2018!