Has anyone taken the Certified Secure Software Lifecycle Professional (CSSLP) exam?  The Official (ISC)2 Guide to the CSSLP has finally been published so I'm planning to do some self-study (the class at TakeDownCon Dallas was cancelled, unfortunately).  I was curious about your impression of the difficulty of the exam and your assessment of the benefit of the knowledge gained from preparation.

Thank you

Is it more focused on the SDLC or does it cover more technical topics in detail? Common programming mistakes, validating inputs, etc? I've had my eye on http://www.sans.org/security-training/defending-web-applications-security-essentials-1442-mid (obviously focused on web apps) but am also curious about CSSLP and other offerings.

Just passed CSSLP. I am glad i took it. The format and quetion structure is very similar to CISSP as you would expect (ie you either know or you dont, not like CISA where they play arround with the English language to make it trickier)
I think it is very very relevant to those who are into secure SDLC. While going through the material I already got a ton of tips on what i should be doing to making my info-sec reviews better. I from studied the ISC2 official guide to CSSLP .