My friend Grodog has finally posted his review of Castle Zagyg: Upper Works. It runs 15 pages(!), and I confess I don't agree with everything he says about it (in particular his comments that the Greyhawk elements are limited to mere "name dropping"), but it's well worth reading. Grodog is a lover of all things Greyhawk from way back. In fact, his excellent site was one of the inspirations for my starting up this blog.
Read the review, read my review again, and go out and buy CZ: Upper Works while you still can.