I got Naked States years ago so I decided to get this one as well. I'm not sure which I like best (it's been so long since I watched "States") but this one was interesting. The video work was generally well done, Tunick might even give a better impression of himself this time around and sometimes it even looked 'arty'.
I don't remember much about the gallery extra but the New York/Grand Central bit had a somewhat disorganized look to it (maybe all photo shoots are like that), and appeared to consist entirely of hundreds of women. The resulting pictures didn't look like art to me, or pornography, but the women seemed to really enjoy themselves- not much sign of nervousness.
In all of the countries shown,in some of which only a few people posed, it seemed to be a common thread that people would be a little nervous but also excited and enjoying themselves- that might be the best part of this program (the joy of the occaision).
Some pictures come out more artful than others but this is a good video for what art does come through and for the look on people's faces as they nervously have a good time. I don't regret getting it.