I took my CISSP last month but did not pass, so now I'm looking into attending a bootcamp. Does anyone have any recommendations which one is good? I have been looking at Training Camp and Secure Ninja. There has been mixed reviews on Training Camp but not much on Secure Nina.
I have to echo what Mr. Roeglin said about certification prep boot camps. I would advise against them unless you need help with generic test taking; or it has been a significant time lapse (months) between your focused study and your exam date.
Boot Camps are a very quick and high level review of the material. It's meant to be a reminder about what high level topics are on the exam, and not a deep dive into those optics. Think along the lines of "Hey, remember this? Let's move on." Boot camps are not really there to teach you anything new. A boot camp, no matter how highly rated, is not going to condense 5-10 years of experience in 2 or 3 different specialized occupations into a one or two week lecture.
Most of the time, the feedback that I got from attendees was that the boot camp coach/presenter/teacher was unable to re-frame any of the material in a way that unlocked new understanding or created an epiphany.
So, please consider why you're attending a boot camp. It's mostly just slides with the exam topics pasted up on the screen for about 30 seconds each kind of like a guided flash-card type study with some coaching on exam taking thrown in. In that case, in my opinion, you're best just getting the cheaper offering.
I have used Secure Ninja and can recommend them as being a very competent training provider. They provided me more hands-on than book learning. I did my CISSP bootcamp through either Training Camp or Global Knowledge (it's been 10+ years so I can't remember) and I have since taken another course through Global Knowledge on a different topic so that maybe why they are stuck in my head. I would always recommend a bootcamp to be the cherry on top of your studying and not the foundation or only thing you use to pass a certification. My CISSP bootcamp was taken a year after I began studying. I also passed Security+ and Network+ during that year to gain strength in those domains. Since you have already been studying, a bootcamp may help you with test taking skills or defeating the habits of an IT technician to attack the test versus think like management, but not sure how much more you will get out of it. I have also seen some of the cheaper vendors bring in "teachers" of various degree of effectiveness.