Not so fast. Some people actually have pretty good results with CSP3. CSP3 DOES bind to myostatin, and some people will get pretty good results with it. Others won't. But I guess that's true for a lot of supplements.
I know a few people that experience a very marked difference in their ability to build muscle mass when they are on CSP3 -- especially people that were sedentary when they were growing up, but have now been training for several years -- while others seem to be non-respondents to it.
I've also heard that it also works very well when combined with gear.
If you have been training for a long time, but only started after you stopped growing up, my advice is to try a bottle and see what your results are, especially if you can combine it with Carbolin 19.