Made my first attempt at the CISSP today and failed, just barely. I guess the main reason I wanted to post something is to answer a question I had before I took the test. I was reading these posts 2 weeks ago and a lot of the "passed" posts say that multiple study guides/reference books were used. I was reading these and wondering to myself "Is that really necessary? Shouldn't the official ISC2 study guide by Sybex encompass just about everything since they sponsor the exam?".
Well, I'm going to go with "yes, it's necessary". I relied solely on the ISC2 7th Edition book and additional practice tests. I read it cover to cover and made hundreds of my own flashcards in the process. And for the last week I've been reviewing those flash cards and taking all the ISC2 practice tests (domain and combined). If you're like me and looking for validation that just reading the one booking is enough, I'm sorry to say that I don't think it is.
I've got my second attempt scheduled for April 28th and intend to review several other sources before then so I can more than just barely pass.