The ported barrel..
Don't know for sure if this is the same, but I had a V-10 Springfield in 45 ACP (ported, small frame). If you shoot at dusk it makes a way cool fireworks show (flame shoots maybe a foot into the air).
I'm thinking that if you were in a self-defense situation, even if you missed they'd be blinded by the light and maybe get their eyebrows burned.
I would NEVER shoot this without hearing protection unless my life was in danger, and it was a trade-off for never hearing again. Recoil was no problem (actually for such a light gun recoil was very nominal) but there's some muzzle blast if that bothers you. Have fun.