The only time I feel a need for such a product is when I let the slide slam home on a newly inserted magazine for loading.
I keep the muzzle pointed in a "harmless" direction...but into the floor of the room or into the wall at the far end of the basement is not desirable.
This is the only time I take action that might cause a discharge ..not likely, but it is part of the firing sequence of the pistol.
All other times I have enough sense to be sure the weapon is unloaded ...but still pointed in a "safe" direction.
At that price, however, I'll patch a hole in the floor if that ever becomes necessary.