I was there Sunday morning (10/26) when it opened at 10:00 AM. I was fifth in line but the room had about 30 people by the time they closed the doors.
The pictures in the beginning area are very interesting. Dont walk by these too quickly.
When you go around the corner and see the set, its pretty amazing. The staircase is huge and is actually a part of the original set of the movie. The fireplace, immediately to your right as you turn the corner, is beautiful.
There are drawings and costumes on the left. They are worth looking at.
There is a short movie that explains some of the effects. Fascinating!
The entire thing lasts about 18 minutes.
The only part I didn't like was at the end, the CM said, take a look around and it felt like only seconds and he was saying our time was up. I could've used another 5/10 minutes to look at all I wanted to see. But, that's ok.
I give it a "thumbs up" as a movie teaser.