I'll overlook the typos. I'll overlook the mediocre quality of many of the stories, largely because the volume contains a story by Jonathan L. Howard, creator of Johannes Cabal (a necromancer of some little infamy). (The story is actually about Cabal, and since I would cheerfully read Herr Cabal's grocery list, it was a must.)
However, I would like to get my hands around the neck of the person who told John Joseph Adams that he is a good editor--let alone a good writer. His introductions are wordy, often irrelevant or misleading, and occasionally either sexist or racist. I might have enjoyed the book much more if it had been edited by someone else.
I'd say just buy it for Howard's story, enjoy as many of the others as you can, ignore the rest, and whatever you do, don't read Adams' introductions.