Highly recommended for those who enjoy heights - after this, all skyscraper viewing platforms will seem tame. Not cheap at $185.00 plus tax, but you get your money's worth. Safety regulations are rigorously and repeatedly followed. After orientation, you will take the elevator to the 100th-floor viewing area, where you will don your jumpsuit and safety harness. The harness will be checked (4 times) and attached to a sled that is locked onto a heavy safety rail for the whole trip outside. You now step outside and ascend to a platform about 104 stories high, with a view down to the street. Your guide will point out a few sights. This must also serve to give those who panic a chance to step back inside before they commit to the rest of the climb. You then ascend an exterior staircase (no guard rail, but you are firmly tethered) to the upper platform at about 110 stories. You are encouraged to lean out facing outwards (supported by your harness). After this each person individually can lean out backwards for photographs and video, before you are lead back into the infrastructure. Afterwards you may linger on the regular 100th floor viewing platform.
The experience is exhilarating but entirely safe - you could not fall or even escape the safety mechanisms if you tried.
Points to note
The experience takes a good two hours and cannot be shortened (and no bathroom breaks).
Tickets specify "rain or shine" so be sure that weather and visibility will be good before booking.
Avoid very hot days (you must wear a full jumpsuit and climb about 8 stories outdoors).
You must place all loose objects except eyeglasses and wedding rings. in a locker so no cell phones or cameras (they will check).
Photographs are available for $20, You will receive a free video of your climb, but you may not see much of yourself if you are towards the end of the line of climbers. However, it will include an individual shot of you leaning backwards off the top platform.
There are weight (310 lb) and height restrictions.
You cannot climb if intoxicated (you will be breath tested).
The top platform overlooks the regular viewing platform about 10 floors below, so it is not a straight view down to the street.