To be completely honest, I didn't think this product would add much to my skin so I never tried it - I figured the moisturizer was plenty hydration. But a while back, Luminance included a sample of this (thanks guys!) in one of my orders. At the time I got it, I had been dealing with particularly bad acne for a few months which, included pretty severe inflammation and flaky skin despite sticking to my normal routine.
I decided to try the nourishing serum since I had it, and applied it after the acne serum but before my moisturizer, and it really changed everything in a few days. My skin was no longer flaking, the inflammation started to subside, my acne was disappearing, and my skin finally started to heal!
After that sample I've been convinced this product makes all the difference for my sensitive skin. It's especially great now that the weather's been cold and dry. If I notice a dry patch on my face, I concentrate a little extra product there prior to moisturizing and it's gone over night. Truly amazing.