I agree that it's worth seeing--even with everyone complaining about there being no seating. Also, you can't sit on the rails and they won't let you bring a stroller in. It is however beautifully filmed and until I can visit China myself it will have to do.
Actually, my most embarassing moment at Disney World happened there. In 1990 I went to WDW for spring break. In the middle of the film, realizing what I was seeing, I said (loud due to surprise) "THIS IS TIANANMEN SQUARE!" None of the other guests reacted at all, but the CMs looked nervous. I felt terrible that I had embarassed them and after the movie covered my face and practically ran out.
Not sure they'll be letting me into China...