Bit Willie using that product will have long term problems. At first it will seem a miracle as it removes the protective outer layers of dead skin and the body repairs itself giving the impression of a regenerative product, but in fact it is destroying the skin.
All the micro-organisms that help to protect the skin are killed off, no more protective dead layer of skin we should have, and as use is continued further layers are destroyed while still looking healthy. But the end result is too few layers in too many places and the skin will look 20 years older with major skin problems.
One of the claimed benefits is reducing wrinkles, well yea killing off outer layers and drying of the skin makes it taught, thus reducing wrinkles. But a very unhealthy way to do it as the person starts to kiss their once healthy skin goodbye in a year or two. (sooner if the product is too concentrated)
Personally in good conscience I could not allow such a product to be recommended to ANYONE and I hope he listens and researches factual sites rather than the fake review sites