Super fun, lots of cool puzzles! I would recommend keeping the party size between 3 and 5 though, its more of a one of a time puzzle than spread out and solve multiple puzzles.
Groupon Exclusive: Standard Admission Experience for One Adult (Ages 13–64) (33)
It was empty on a Tuesday afternoon and a week after July 4th. Straight walk-through and every immediate access to the windows; hence it was great and very worthwhile trip to the observation deck for us.
