Received my copy from Lulu today. It's wonderful and fills a heretofore unaddressed niche in the OD&D OSR scene: re-presenting the original 1974 rules while retaining all of the ambiguities that really force you to think, craft, and make the game your own for your table.
Delving Deeper serves a similar purpose, but does away with as many ambiguities as it can in the name of making the game more immediately playable. That's the other retroclone I wholeheartedly recommend anyone interested in OD&D in this day and age check out.