Ive done extensive training with STG.
Pistol, rifle, blade, etc. Befote Defoor got in the fold.
I will say that it is unlike any other training in that they dont teach the typical stuff. Tom has a very specific way of instructing and most pistol classes result in students Not making the standards in order to get into the 2.0 class. I think I know of 7 off the top of my head who have made it while I was present. Their instructor standard is even higher and very much harder.
Furthermore the mindset talks are the best ive ever heard. The whole class is an experience.
Thing is, its not meant for the average person in that you have to be serious about your safety and are willing to get out of your comfort zone to learn. Ive seen people quit after one day because they couldn't cut it and felt embarrassed.
If you are thinkin about taking the classes later this year ill be at a bunch of them helpin out.