I sat the exam yesterday and passed! It was difficult to say the least and I was convinced through the whole thing that I was failing, I kept at it and focussed on each question as it came. I started studying in December and my exam was in Feb. First 6 weeks I watched some ondemand training on O'Reilly platform by Sari Greene. Then the last 6 weeks was intense study (several hours a day) using the OSG, the Offical Practice tests, Destination Cert YouTube series and their app for questions, Peter Zerger's YT content, cissp.app app, any other YT I could find on answering hard questions and of course the study groups. I also used David Hawkins pdf (in this chat) on exam strategies. I can't tell you what I thought worked for me, all I can say is the exam really did expect you to understand concepts and the broader range of perspectives you can get the better. Hope that helps someone.