In general, I have never been a huge fan of Marquez's art, and I initially thought it was a stark departure from Immonen's penciling in the previous issues. Looking back, however, I find the art to be appropriate and especially fitting. The original X-Men actually look like teenagers, and, at least for me, you get a very real sense of how young these original five members actually are, which in the end allows for the gravity of the big picture to sink in. I still feel like Jean is not getting the kind of justice she deserves in Marquez's depiction, but the core message comes across the same nonetheless.
All-New X-Men #6 is yet another hit in this nascent series and is definitely going places. Despite some minor reservations I have about Marquez's art, in general, I think both the depictions of characters and the writing in this book have a unique synergy that allow the reader to connect to this innovative story that Bendis is carefully unraveling.