I have it. It's a non-proctored, open-book exam. The fact that it's non-proctored makes it less credible, in my opinion. I did a write-up on my experience with it over on techexams.net.
I'm not sure what your interest in it is, but if you're wondering whether it'll make you stand out in the employment line-up, I doubt it. The class was fun, but while it covers the most popular open source IDS engine out there, it's not an intrusion detection course. That's what SANS 503 is for.