taplinb,
It all depends on the section you take. The professors are generally great at what they do with a few exceptions here and there. As far as IP is concerened, you cannot find a school that is much better in IP than WMCL.
The faculty for IP includes: Carl Moy, author of a treatise on patents. Ken Port for Trademarks, and Niels Schaumann for Trademark/Copyright. In the Fall of 2007, Jay Erstling will join the faculty and he was the former director of the Patent Cooperation Treaty and has held senior positions in the WIPO. Most law schools don't come close to having this kind of IP faculty, even some of the so-called "top" law schools.
For fulltime sections, you have 5 classes.
If I could make generalizations about the profs, I would say:
1) Don't take anything from Heidenreich since he is an extremely hard grader and flunked many people last semester for apparently no reason. He is really old and full of himself.
2) Knapp is very popular for anything. He is a very funny professor and an excellent teacher. He is extremely approachable and friendly.
3) Janus is also another great professor who speaks with clarity.
4) People are mixed about Roberts. I personally didn't care for her style of teaching. She gives these huge class notes that you're supposed to have read before class and then calls on people. Whenever you ask her a question in class, she invariably responds with "what do you think?" Some people think she is really not a friendly person who just tries to appear to be friendly in a lecture setting.
5) Hogg teaches contracts and deliberately speaks in very nebulous terms and seems to obfuscate everything purposefully. In private, he speaks much more plainly and is a very kind man. He seems intimidating at first, but actually he is not. He is very good at convincing you that your own point of view is wrong when actually you are right. He just tells you after he's "fooled" you.

He is very much about the process of reasoning rather than any right/wrong answer, unlike Roberts who seems much more rigid in her positions.
6) Moy teaches civil procedure. He talks EXTREMELY fast and does not engage in any "hide the ball" games that some professors do. He is friendly and is extremely bright. He doesn't call on people at all and for his class, you don't need to read any of the cases assigned. All you have to do is read the Hornbook and just pay really careful attention in his class, preferably writing EVERYTHING down everythign you possibly can because his exam is based on what he says. Also, he is interested in the policy aspect of the law and his exam consists of approximately 50 multiple choice questions and an essay that proposes a rule change to one of the Federal Rules of Civil Procedure and to write about whether you agree with the change or not and why.
7) WRAP (Legal writing) is the most complained about class because it is a lot of work and the curve is very strictly enforced. There is lots of hiding the ball in this class since they don't really teach you how to write well, and only after you've been graded do you get marginally useful comments about what you did wrong. Its not popular at all, but required for all students.

Krishnan is a decent property professor who is friendly. He provides good supplemental material that explains some of the more confusing aspects of the course.
There are many more. If you have any specific questions, feel free to contact me privately.
Hope this helps.