I'm not collecting comics right at the moment, but when I first heard of the story concept, I admit I frowned a little. However I have heard nothing but good things about this series from my comic buddies. From what I understand this isn't a What If? or Elseworlds situation either, it's considered part of regular Marvel continuity.
-------------------- "Thou shalt not be afraid for the terror by night; nor for the arrow that flieth by day;
Nor for the pestilence that walketh in darkness; nor for the destruction that wasteth at noonday." -Psalms 91:5-6