Cisco’s Networkers conference

This year it’s in New Orleans on July 11-16. I was wanting to know of anyone who has ever attened on of these. Is it worth while? Helpful? One nice thing I see is that if you register early you can sign up to take one of their tests FREE!!! What are your thoughts? here is the info on the conference

http://www.cisco.com/networkers/nw04/index.html