Once again, a supplement filled with so much idea-fodder for games that you will have a blast. Have merchants in your group? Want to have them? Want to flesh out that fair or bazaar a bit more? Want to put in obscure magical ingredients? This is a great place to go.
If you are running something other than D20/D&D you'll need to do some price conversions, etc., but this is still a good bargain for any semi-medieval setting.
[4 of 5 Stars!]