I just took the exam a few weeks ago and it was not what I expected.

There's plenty of room to expand beyond 802.11 as well. They could do something similar to SANS 617/GAWN and also include ZigBee, Bluetooth, RFID, etc.

At the same time, it's pretty cheap, and the quality/quantity of material is fair for what you pay. 

The course has been updated since I did it, so I can't comment on the new material. I'd agree with all the the other comments made so far.

At the time I read the following book  to expand on the material whilst doing the course and found it useful:

http://www.amazon.com/Hacking-Exposed-Wireless-Second-Edition/dp/0071666613/ref=dp_ob_title_bk

Another book I've heard good things about but haven't read yet is:

http://www.amazon.com/BackTrack-Wireless-Penetration-Testing-Beginners/dp/1849515581/ref=sr_1_1?s=books&ie=UTF8&qid=1346322592&sr=1-1&keywords=wireless+backtrack

I was studying Vivek's course and decided to try for the OSWP new version. I watched the videos and practiced for two weeks, then took the test and it took me 3 hours to hack everything, get all the screenshots, make the report in a very clean fashion with intro, scope, attacks with screenshots... the whole nine yards and send it off... 24 hours later I got the good news... I was OSWP

With Vivek's material you do a lot more than with the OSWP, I decided to go for the cert because of the OffSec reputation, but Vivek's video course it's a lot more complete