Quoted:
There is a lot of controversy that surrounded Paul, and while I would not ever take a course from him again I did learn things when my agency sent me to one of his courses. When it comes to the CAR system, there is a lot of BS, but there are definite little aspects in it that DO have SOME uses. They are very specific uses, however, and my opinion is that the CAR system is not one that should be adopted across the board. The following is where I have found it very useful:

As mentioned above, extremely tight areas and awkward shooting situations, such as needing to shoot behind you while seated in a vehicle. Paul taught some stuff where the opposite eye is used and the pistol held very closely in front of your face. This cross-dominant eye use has been VERY beneficial to me when needing to search attic and closet areas. Just like when Magpul and other instructors teach switching hands to remain behind cover better, I have found that less of my face sticks out when I've used that tool to search. Another where it has been EXTREMELY handy was it gave me the confidence in shooting with my left hand more, so the point that if I need to I can shoot abidexterous. When it came to shield work, I always ended up being lethal cover on the opposite side because I developed that flexibility being able to use either eye or either hand. While you don't NEED Paul's technique to do that, I found that his technique has aided me some in extremely close quarters shooting situations.

Another aspect I found very beneficial was the weapon retention abilities the CAR position allows. It's been long enough ago that I don't remember what the four different positions are called, but when held in front of you, everything ends up being like  a triangle. When using a handgun, it allowed me to develop additional skills in keeping someone within touching distance from grabbing a gun or TASER and turning a situation into one that needed deadly force.

Paul Castle's credibility sucks, he's a thief, liar, and I'd would never ever take another class from him again. However, as I mentioned, I did learn something in the class I had to go to, and I feel that what I did learn made part of the time worthwhile. I've heard that he died of cancer. If true, I think the CAR system is one that someone could take and cut out what is worthless and develop some of the skills to where they can be useful for advanced shooters that might need those.