They sure do silence the Cymbals and hihat, Snare and toms are OK but not great. They failed to meet my needs, due i need almost to go completly silent.
The bass drum pad were the one who disapointed me the most, i coulde have made all this pads from a sleeping pad and the cost would stop at 8 euros instead of like 80 euros.
But please take in mind that i had to go almost COMPLETLY silent, my practice space is right underneath an office. If you just need the over all loudness to go drop just a wee bit, they work fine.