This collection includes a number of excellent stories and tremendous authors (including one of my personal favorites, Frederic Brown). However, IMHO there are at least an equal (if not greater) number of lesser stories. And the volume concludes with what is actually a mediocre novel.
I should also mention my feeling that there is some iffy "marketing" going on with this book, in particular the back cover copy. This copy begins by talking about how pulp magazines flourished between 1920 and 1950. Yet only 20% of the "stories" are copyrighted prior to 1950 (and these 5 are all from the 1940's). The copy then displays a list of authors "whose work originally appeared in the more artful pulps of the 1950s and 1960s" yet there are still another 20% of the stories copyrighted AFTER 1970.
So I guess I would not recommend this volume as there are I suspect other and better compilations available. Maybe someday I will search them out.