Henry Chalfant and Martha Cooper were praised by Martha Schwendener in The New York Times.
"Thanks to Mr. Chalfant and others, like Martha Cooper, the ephemeral work was preserved in photographs. Sure, it was illegal. But graffiti art has become one of the most globally recognizable and copied forms of contemporary culture. And in the realm of creative civil disobedience, it is one of the most extraordinary instances of a bunch of young, working-class artists affecting the world."