There are several threads about this module around... including a PBP being run in it on the forums.
I'll do a search and link to them shortly.
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Personally, we are playing it right now. I enjoy how free-form the problem solving elements of the module are, while still working along a pre-determined plot-line. It is a very open adventure, which is impressive for something spanning 10 levels of play.
My players seem to be enjoying it too.
Now, if only the cover weren't so ugly...