I have really sensitive skin and have always had allergic reactions to dark hair dye and henna tattoo inks, and I really like getting temporary tattoos. I figured I'd try this one while it was on sale. When I used it, I was almost sure that my skin will start reacting badly after a few minutes. But, it didn't! And its darkening over 24 hours is really nice, and its shade looks like a legit tattoo shade of black for the week it's gonna stay on your skin. I'd definitely buy more once I finish what I have and when it's back in stock.