My Wife and I visited NYC in August 2017 & booked this 'Small Group' tour. There were approximately 20 or so people & our guide was well prepared.
We met at the designated spot & left as planned.
The guide was extremely professional, knowledgeable, approachable and best of all, a local Now Yorker!
The historical commentary really made this tour for us. Booking with a professional tour company is essential for this.
This tour was worth every penny & I would not hesitate to recommend it to anyone wishing to see the Statue & Ellis Island.
Be warned though, it is a long day and if you are doing this in the heat of summer, take lots of water with you as there are not a lot of stops.