Okay, so this is a programme specifically for BJJ athletes to complement their mat training with an eye to making them better at BJJ, but can of course be used by anyone as an excellent stand alone kettlebell programme. Like the promotional page says, it does this without beating you up leaving you drained for your on-mat training sessions. Okay, I think I understand the concept to this.
In my own case, my kettlebelling is to complement my martial arts in a very different way. I don't think martial arts is enough exercise, nor is it healthily balanced exercise. Martial arts training is for winning at martial arts and not for a strong physique, nor good posture. A way to understand this is to consider that shooting a rifle is a martial art, but where is the exercise? Judo, fencing etc are a compromise between exercise and fighting prowess. Good weight training programmes like S&S can counteract the bad physical effects of martial arts training and give someone good posture, good flexibility, a good physique, and real-world strength on and off the mat. This is how S&S is explained in the book and how I see it too.
But, to make kettlebelling the handmaid of a particular martial art is a very powerful thing - where the kettlebell training is expertly designed specifically for excelling at the martial art in question. Wow! Pavel knows what he is talking about. This will be a very well received product and will do a lot of good for BJJ players who struggle with not having enough strength to get the most out of their chosen martial art. It can be terrifically frustrating to have to wait for months or years of on mat training to develop the right kind of strength and conditioning. To have a scientifically designed home training method available to you will work wonders for everyone! This is great news indeed!