My experience:
This serum is very light on the skin and it did not cause any itchiness or redness. I was able to use it twice a day. I have a sensitive skin, and I didn't feel any tingling sensation or heat after applying this on my skin. It also relieves all the redness in my skin and was very lightweight and absorbed by my skin easily, it doesn't feel taky at all, I even use this before my Sunscreen in the morning, and it doesn't affect it's performance at all. So I can really say that if you have sensitive skin you might give this serum a try!