I am completely knocked out by the designs. I really love the Danger Ace costume, in particular. (Somehow, it looks both retro and modern at the same time.) And it's great that Marco also happens to be a talented colorist -- because it's nice to see them in color!
In addition to his excellent design sense, Marco is also the fastest artist I have worked with, and that is truly an invaluable skill. The book is speeding towards completion (note to self: remember to find a letterer to put words into comic), and I'll keep everyone posted on the news as it approaches publication. Stay tuned.