The New York Explorer Pass was great value for money. Very easy to use and well known at the different attractions. Only hick-up we had was at the Statue of Liberty/Ellis Island - where we could not pre-book - and therefore had to take pot luck as to when we could go. Otherwise an excellent way to ensure that you can see what you like in NYC.
A MUST HAVE when in NYC! No need to queue for tickets at the Statue of Liberty, entrance at Museums included too! Good deal!
If any of you intend to stay in New York for a long time at least a week, the explorer pass is the best way to do it. I spend a week in the city, and visited ten attractions. Buying the pass gave me a discount on all the fees to the various attractions.