I can feel this mask work. I was nervous about trying the mask after seeing several reviews saying it caused some serious redness on faces. I am a very fair skinned, freckled redhead with a history of sensitive skin, and I use this mask once a week. My face does become a tiny bit red after taking it off, but i'm sure some of it is due to actually washing the mask off with a cloth. Because of the slight redness after the mask, I do the mask at night time. The mornings after using this mask, and throughout the rest of the day, my face has a beautiful, bright glow. I'll be buying another jar once this one is gone (this will last me a long time, though). Don't let the sensitive skin comments scare you! I love my skin after this mask!!!