I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
Each 'chapter' is alright, but short, even for brief origin stories. They were alright, but not fantastic, and thus I was left feeling as if this were a half-formed idea. Yes, these were all originally free, but they're paid now, and even for a couple dollars? This doesn't hold together.
The art is pretty amazing, although there are different artists for each six-or-so page origin story.
I wouldn't recommend picking it up unless you're a completist, but it was a quick read if you snatched 'em when they were free.