Like many things Gaiman, it is odd and sweet and tastes a little bit of what fairy wine must be like, though you should not, y'know.
I just think it could have been longer. Three issues, or one extra-size issue. It felt truncuated, like so much more could have been done and instead Gaiman left us only shadows to puzzle out. Which might be fitting for a Batman story, but for a meta-Batman story I require a little more meat. Great focus on his inspirating force to others and the focus on saving even one life, but there is more to Batman than that. What of Gotham City, *his* city? And in the ending shot, there is the Boy Wonder, but what about Grayson? Yes, reading it you could assume that he meant ALL Boy Wonders, but the panel clearly points to Tim. I thought that Dick deserved a goodbye all of his own.
Again, very nice, and much better than anything Morrison pulled up in R.I.P. ... and yet just not quite the A-grade I was expecting from Gaiman. Like the dancing of angels on a pinhead, but that's not what I expect from basically a wrapping up and beginning of the Batman.