Fat to Fire 1 & 2 are good programs for those new to Renegade Training. But they are only a "sample" of a total program. The whole program is even more brutal than what you see in those articles.
I have done several of them in the past, and I'm currently doing one again. But if you follow Fat to Fire 1 or 2, you will get a good taste of Renegade Training and what it can do if you follow it correctly.
I had posted photos of my "before" and "after" while utilizing a Renegade program in the Photo Forum a while back. I went from about 15-16% bodyfat to about 6% and was shredded all over. I also had more energy, endurance and overall conditioning than anything I've ever done.
It's brutal. But it works.