I thought it was really great!  I, too, have most of these stories in Masterwork form.  But I also remember eating up origin reprints as a kid!  It's like Origins Of Marvel Comics, Son Of Origins and more - all in one!

This was a lot of fun to sit down and kick back with.  I was really happy to see all the covers for all the stories were also included.  Gret fun, great value. 

If I woulda changed anything, it would be to include stuff like the first Ant-Man and Giant-Man appearances, not just the first Dr. Pym.  Maybe also Avengers #4, and the first FF with the uniforms.  I understand why they weren't included, but some additional exceptions woulda been nothing but sweet!

Another volume could include major first appearances - like Black Panther, etc.

And how about a companion villains volume?  A comprehensive Bring On The Bad Guys style book!   

Yet another idea might be to compile the later major RETELLINGS of these origins, like Captain America #176.  It might be fun to see these all in order through the years, as origins got fleshed out more.

Anyway, I wanted to say thanks for this fun book.