Unfortunately denied the soap - at least on my skin - with your most important task: to produce a lubricating film on the shaver. It dries the skin even so much from that the blade of my Rasierhobels begins noticeably to "scratch" - rather than slide. No pleasure with a sharp blade. This also happens regardless of the amount of the supplied water.
In several experiments with this soap the effect was so strong that I had to set up between the new foam with a different shaving to shave at all to be able to finish.