Smartass gimmicks aside (and the Doctorow story aside, because he's constitutionally incapable of not smarting ass) this has some good stories in it. And some very good poetry. Also some stories that are just okay. Par for the Borderlands course, I suppose. The stories brush past each other in a way that's occasionally interesting but not really genre-changing. (I don't remember whether that's par for the course; been too long since I read the old collections.)
I think I have never been in the Bordertown target audience. My adolescence doesn't fit the metaphor; or else, as a so-called adult, I don't fit the ending. (The opening story does nod to the "Bordertown isn't for me" angle, and I appreciate that, but I can't get seventeen-year-old-me's take on it.) So whatever's YA about this doesn't quite satisfy me, and everything knowing-adult strikes me as clunky. I enjoyed the stories but at a distance. I'll recommend the poetry direct, though.