I've taken skill training classes with programs I would suggest to others; www.S2Institute.com
, but I've heard directly from a few gun writers & tactics instructors that in general, that they do not comment or "bad mouth" firearm trainers/schools just as a industry standard.
I can see that but it's hard to really gauge a program or school w/o spending $$$.
I always advise a new gun owner or entry level student take a 4hr workshop or 1 day class first to review a training program.
It's a touchy subject because opinions & feelings vary with those in the shooting sports/armed professionals.