Of course, since there isn't anything in the collection that hasn't already been published, part of the appeal is the book itself: a nice, classy-looking, mid-sized hardcover. At about $25 bucks, it's a good deal for what you get.
Although I'd have liked to have seen a bit of introductory material, author's note, publication history, etc. in the new volume. Such stuff was in the press release, of course, but I think it would help casual buyers get into Jason's work a little more easily.
On that note, you can also read about Jason's contribution to Marvel's Strange Tales if you haven't already.