Enjoyable visit and the views were spectacular of the boughs of New York. My tips are getting there early, so to avoid the queues and the 86th floor deck from being crowded. The 102th floor is well worth a visit too.
The audio tour is ok however at the end of the tour you have to hand the device back in.
In this day and age, when everyone has MP3 players either free standing or on phones, it is annoying that you couldn’t download the tour, so that one back home you know why you took a particular photo.(like you can with the top of the rock audio tour)