We were briefly introduced to CAR during a POST training I attended in Sacramento a few years ago. It seemed clumsy and designed to look cool but didnt seem to function well.
On the issue of weaver vs. isoceles, it seems like a silly war to wade into. I don't feel either is hands down superior to the other. I stick with training folks to use modified weaver as it fits with protecting your strong side and I only train cops. Seems simple to me, others may disagree...
Buying a safe and sane firework is like paying a hooker for a hug. I do not see the appeal in it.