Saying instructionals are detailed enough to learn a technique without an instructor is like saying I could go into my BJJ class, learn the tech from my teacher and just begin repping it out no problem without help. This is rarely if ever the case.
Teachers walk around the class and answer the constant questions about things that people are having trouble with, or even pointing out the mistakes people are making, after having just seen the tech up close in person. And I'm not talking about white belts. No one watches a black belt demo a tech and just starts to rep it out flawlessly. Without someone watching and catching your mistakes you will probably just think you're doing great, but really it could be better.
I always ask questions about techniques I've "learned" from video when I get the chance to in class.
Also the fact that GC teaches techniques that will work against an unskilled opponent is nullified by the fact that techniques that work on a skilled opponent who is actively looking to thwart your use of those techniques, will also work on an unskilled opponent.
Saying that they are detailed enough to learn without an instructor is NOT saying that you can learn a move in class and rep it out without help. Your instructor does not have enough time, and frequently enough experience teaching to be able to teach with the detail that Rener and Ryron teach with in the DVDs. Many instructors are fantastic fighters, but not great teachers. The one that are great teachers just do not have the time to do this. I have a hard time believing Rener and Ryron can do this in their classes as well. It would take too long. But, honestly the detail is that good. The format is like this:
-Tell you the name of the technique
-Demonstrate the technique slowly
-Explain the basic parts and demonstrate again with multiple angles
-Explain one detail and demonstrate again
-Explain another detail and demonstrate again (and so on until they have covered all details)
-Explain the most common mistakes people make with the technique (where the pressure or angle of force should flow, hand position, etc) while demonstrating it again.
By the time you have watched the whole thing you are thinking, "I could do that, " instead of, "that is a lot of details!" If you get stuck (which can sometimes happen), you can play the silent demo which shows one rep done by Ryron and one by Rener with different angles. Both are done slowly. Basically you just cannot get the same detail in class. Also the instruction is coming from world class fighters and teachers on top of it all.
Like I said in the original post, the combatives is not that helpful if you want to improve your sport game, but it does have some great self defense techniques in it (which is what I began this journey in the first place). I have not done the Master Cycle yet (the course after the combatives are complete). From my understanding it is supposed to continue to cover self defense as well as sport technique, but I am not sure where I am going to go from here since I would really like to focus on my sport game for a while. Sparring and competition has really gotten me hooked. I love competing.