I have a long, detailed review here: http://nilisnotnull.blogspot.com/2013/06/mage-guild-wizardly-resources-for-osric.html The short summary is that while there are interesting bits and pieces here, in terms of a complete supplement (and for the original price of $4.00) it left something to be desired. At the current price of $2.00 it's actually alright, but not stellar. However the author is working on an updated version that will be free for those who bought this product, so that's good news.

This product is an ok production. Nothing about it jumped out at me screaming use me.

FYI this product contains:

12 spells 5 magic items 2 new monsters 8 NPC guild members 2 paragraphs of fitting into your game 5 ideas for hooks and or adventures (each is like 4 sentences) 0 Maps (but it tells you to buy the 'enhanced' edition for maps)