We went in 2003. Me, My DH, DS 12, DD 9. It took about 1 1/2 hours. They walk you through room to room and talk about the actual Titanic Experience. Prior to the tour you receive a name of a person and at the end you see if you survived. We truly enjoyed it. They told stories about the experience the passengers went through, which were supposed to be from actual survivors when interviewed years ago. They explained how the ship was built and short cuts taken that caused the tragedy, and much more. We had bought our tickets from ticketmania for $15.00 for one adult and one child. It was the best $30 I ever spent. We had a good time and my children were old enough to understand what it was all about. I think that makes a big difference. For the money $30 total we felt it was worth it. It is not a big ticket type of place and does not pretend to be. It was just an hour and a half of a good experience.
Of course, this was all My Humble Opinion. I hope it helps you decide.
Happy New Year
Elke