I will not speak to the quality of the course since I teach it and would necessarily be more than a bit biased.
The course is in the process of transitioning to a 6 day format (previously 4) at SANS 2009 in March, so I would wait to gather opinions until after this debut. Also the associated GWAPT certification will go live at this point. My understanding is that the number of labs will increase significantly. I believe that Ed Skoudis (author of SANS 504 and 560 courses) worked closely with the author (and a colleague of Ed's) Kevin Johnson to expand the course.
SANS now will have 3 penetration testing courses covering Network, Web, and Wireless. Should be loads of fun. I would really love to see SANS come up with a pen testing GSE equivalent that required each...
I will be serving as TA for the course when it debuts, so feel free to ping me after for additional info.
Hope this helps.
GSE, CASP, CISSP, GSEC, GCIA, GCIH, GPEN, GCWN, GCFA, MCSE