I did it and I loved it! You start out in the upstairs lobby of the theater exploring the WICKED "museum" which is compromised of original costumes, costume sketches, photos of cast members through the run of the show and its tour, retired props, and even props from cut scenes! The best thing, though, is the giant scale model of the inside of the Gershwin Theatre and the set. It is fascinating and shows the enourmousness of the show. When the "tour" officially starts, two cast members get on mikes and talk about the items you've been viewing. You are then led into the auditorium where you watch a short promotional/behind the scenes video. After the vid, the two actors point out a lot of different things on the stage and throughout the house. You are then let out the other side where you can meet the two actors and buy souveniers specific to the tour. I had a great time. I've even been backstage at the Gershwin when I sold Peter Pan souveniers there several years ago and have been involved in theater since I was quite young, yet I still enjoyed it. I just wish I'd brought a camera!
PS When I went, Sean McCourt and Anthony Galde did the tour. Now that Sean is gone, does anyone know who leads it?
<-- Tevye, FIDDLER ON THE ROOF, March 2018