Way of the Wicked is a well crafted adventure, with thought and care into how to run an evil campaign.
The missions are clear, while allowing sufficient room and flexibility for the PCs to determine how they get from point A to point B.
There are stat blocks presented for all the encounters, which cuts down on the GM having to refer to other books, which in turn makes the game run smoother.
My players absolutely love this adventure. Possibly too much, as during one of my last sessions they were giggling as their evil plans met with success.
If you are looking to run (or play) in an evil campaign, this is the adventure for you!
I would also recommend checking out the other books in this campaign. Simply amazing!