Like I said earlier, the major con was that the hair mask really irritated my sensitive scalp when I used the product on my entire head.
What I did the next time I used up the rest of the mask was instead of applying it onto my scalp, I just applied it mid length all the way to the tips and DID NOT RUN MY FINGERS THROUGH THE HAIR FROM TOP TO BOTTOM like the mask recommends. I just left my scalp alone entirely and waited additional 7 minutes.
The second time I did not get any reaction because my scalp was totally free from this product.
So if you are ok with that, just use the product from mid length all the way down and do not use it on your scalp if you have sensitive skin on your head.