Hey!
Well, I went to see the exhibition at the MET Breuer. The first impression of the space was great, love the way the MET set up the exhibition, they are usually very good at this. Unfortunately taking photo in that exhibition was not allowed.
As for the photos. There were some of her famous photos there like the twin and the boy in the park with hand grenade. Looking closely at her prints of which some were taking indoor low light situation, it reminded me of Kodak Tri-X pushed, and they were indeed when I look through the book and see her contact sheets in the next room.
I have to admit that I've never been a big fan of her works since they are tend to be on strange and sometime seems macabre. Still, if you like photography like I do and have a chance to see her works in real life than you should see them.
By the way, here's a video about the exhibition from NYC-ARTS, a weekly show about arts in NYC area on PBS/Thirteen...
http://www.nyc-arts.org/showclips/140794/nyc-arts-choice-diane-arbus-in-the-beginningTake care,
Buddy