I echo comments by previous reviewers - Audrey aka Bytegirl24 gave us a fabulous tour! Her intimate insider's perspective was fascinating. But equally impressive was her knowledge about the scene in many countries. She made great effort to personally engage each person on the tour, with an extra emphasis on making the history relevant to the younger crowd. The physical area covered might have been easy to view on our own, but instead of just looking at the beautiful art we learned about the culture and history of the art form, the artists, the techniques, the controversies, the business... Consistent with street art and graffiti, the work will change before long - I wouldn't hesitate to come again next time we are in NYC. A very affordable half day excursion and well worth the time!! Access by subway was easy.