This soap is awesome.
Gritty, and I mean GRITTY. It exfoliates for sure. There might even be tiny bits of rock in it.
Love the black color. The lather is cool looking, and it's great for seeing if you missed a spot.
One drawback (certainly not worth a star demerit): it makes your shower look dirty if any soap residue is not rinsed away. (it is black, so can't leave that around the rim of the shower for the girlfriend to see)
To fix this problem: use a post shower spray cleaner.
It makes the bathroom smell fresh and extends the life of the shower between serious scrubbing sessions.