Hello,
I just passed the Security+ exam the first time I took it with the help of Darril Gibson and his Full Security+ Course website content. I did not buy the book, and did everything he recommended on the online Study Guide, and that was just enough to pass it

The exam was 72 questions, 90 minutes to complete it, and you need a 750 score to pass. Scale score is between 100 and 900 according to Score Report print out I was given at the end of test. I got 783, and the exam was much tougher than what everyone was telling me.
I do have a background in IT, just not on the Security field. Recommended experience per the CompTIA website is Network+ and two years of experience in IT administration with a security focus.
I've never studied or taken the Network+ exam, so you can pass it without that experience. I do have 10+ years working in the IT field, but not in Security
In any case, I hope this info helps anybody else in passing their exam.
Regards
Victor