I followed the advice on Yelp and got a ticket at Tix4Tonight for $16.60 plus a $3.00 service charge (otherwise known as $19.60). I thought the exhibit was good, not great, until I came the room with a big piece of the side of the Titanic that they hauled out of the ocean (called, aptly, The Big Piece). FYI: it's big. And it's worth the cost of admission. History came alive, though not literally. I left satisfied, which doesn't happen often.
Three star exhibit with five star chunk of the Titanic = four stars. Go.