I’m sure the Impact Snap works for many people. But if it requires the extreme bowing or flexion of the left wrist thru impact I don’t think it would work for me.
The bowing / flexion of the left wrist into impact is a very compromised position. With a strong left hand grip there is no need to bow your left wrist at impact.
The left wrist comes into impact as it is at set up. So the feel of the left wrist is to hit with the side of the left hand.
That’s why for me being a right hand dominant player concentrating on the right hand / wrist works better.