I use that particular technique, or parts of it, a lot at full speed on a sparring partner that doesn't know what I'm going to do. The catching the hand with an down and outward parry/check and rebounding into a backhand strike (fist or open hand)to the side of a person's head is a very fast and effective technique. Especially when trying to close the gap from the outside. Grabbing their collar (or hair) and yanking them down to their knees (or stomach depending on their momentum) and following them down to finish with an ad-lib is also useful. I also use that first part against kicks coming at me. I'm beginning to think that you are overly generalizing a bit from your own experience and disregarding the experience of others. We've all been in the "I'd never use this so why should I train it?" phase of our training, but we then go on to learn new things about it. Just when I think that a technique isn't worth much, my teacher or some other senior will come along and either show me why what I was doing was not effective, or how to tweak it to make it work right. That's when the lightbulbs come on and you start to re-think the rest of your material in that light to see if it too can be tweaked like that. It's also when you see that the old boys that came up with this stuff weren't just sitting around drinking coffee and playing an imaginary game, but rather deriving the techniques from their experiences. I've been in quite a few fights, I used to bounce in bars and work concert security and still have to break up fights several times per year where I'm at. I found GJJ very useful to me but the same holds true with my Karate, Kempo and Kajukenbo training. I have preferences and feel that Kajukenbo is the best fit for me, but that doesn't mean there wasn't value in the other training I had. John Bishop and I talk about our mutual Shotokan experiences and agree that it was useful, but not for us ultimately. Same goes for one of John's black belts who had previously been with the USSD. We talked about what we liked and didn't and how we're both happy with where we're at now. Take the meat and leave the bones.