Not true, I had Daryl do BNP (because he had been using it for years and was more comfortable with it).
I'LL GO AGAINST COMMON TRAINING DOGMA
Among pressing movements, the BNP is the one with the greater deltoid recruitment. As such it is potentially the best shoulder builder.
I use it personally but that is because my background in olympic lifting gave me good shoulder mobility.
It is also true that it can be an hazardous shoulder movement.
Because of that last reason I CANNOT recommend it to you, or anyone else... if you are predisposed to a shoulder injury and you get hurt from it because of my recommendation I would feel bad and look like and idiot!
I can only tell you that it works well if you can do it safely, but that not everybody can do it safely.