Mostly pretty well put Capt. Seems a few people know and like you too, that's a good sign. I agree with the guy who talks about experience not being the best measure though. The worst Cave Instructors I know of are also some of the most experienced. Like any other scuba instructor, I think some get jaded perhaps or maybe too casual or maybe it's overconfidence and a lack of attention to detail.
One thing is for sure, you can consistently see a huge difference in divers trained by different instructors. Just ask the best cave diver you can find about that.