Spent more time queueing for this than viewing it. Almost 2hr wait to get on the ferry going and the same coming back...so give yourself a day for this attraction. More ferries returning to New York rather than New Jersey might be a good idea as the New Jersey ferries were leaving with around 20-30 people aboard whilst there were hundreds waiting for the ferries to New York.
Your better off seeing Statue of Liberty from the Staten Island ferry which is free and giving Ellis Island a miss! Definitely the worst of all the New York attractions!!!