I applied the product to my face and neck, gently massaging it in, when I first hopped in the shower. I left it on my skin while I shampooed my hair etc. I noticed some tingling sensations around sensitive areas like the nose/nostrils. This reminded me that the person who showed me the product had said to go easy with the product at first and maybe only use it once or twice a week until you see how your skin reacts. After a few minutes, I massaged it in further while rinsing it off.
I found that it does exfoliate and invigorate the skin nicely and I will continue to use the product. I have used it three or four times now and notice that my skin feels smoother but can appear a bit red and blotchy after use. This product is effective but people with sensitive skin may find that it is a bit "too" effective.
Take notice of how your skin reacts with the first couple of uses. It is effective but may be a bit strong for sensitive skin (or sensitive areas of your skin).