For all of those in the process, or planning to be, it's a great experience, you'll learn a lot, even if you are well-versed, already, and you'll have a really good time along the way. Just be prepared for long hours and lots of self-paced study!
"All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved." - Sun Tzu, 'The Art of War'
OSCE, OSCP , GPEN, C|EH