As far as Broadway shows on cruise ships go, we'll go if we have open time but it's not a priority. If there's is a show we want to see we'll go see it on Broadway. We did not go see Hairspray cuz we saw it and did not feel the need to skip something else. But on Quantum we have 11 nights so we'll find time to see Mamma Mia. Plus we really liked it on Broadway!