I like pin knocks, I think they saved me a bunch of arrows.
at a price......
The pin knocks don't last very long intil they break or they fit loose on the pin and need to be replaced.
I have also noticed from indoor season if your pin gets a dent in it, even a small ding from another arrow, change the pin. It won't fly with the rest of your arrows.
A man is as unhappy as he has convinced himself he is.