I tried the Coastal Scents black soap I had as a sample from IMATS LA 2012. I was told by the guy who gave it to me that I should not use the soap directly on the skin, just lather it with water and apply it on damp/wet skin. It is moisturizing enough but have not fully experienced the benefits since it is sample size. I used it just on my face. At first, I had break outs but after a few use, it made my skin smooth, though at times, a bit dry. (I have Normal/Combination skin type)
I did not get the chance to buy it again. I bought a different one in Amazon for cheaper price ($15.00 for 6 soaps), and it seems it just works the same as the CS one.