I've been using this serum for well over a year. Started at age 29 after a long fruitless search for products to help with my rosacea. My case was fairly mild but I still had a lot of redness on my cheeks, some bumps, and occasionally, a burning sensation. I've been using the Skin Recovery Moisturizer, which I also really like, for about 2 years and while it didn't irritate my rosacea, it didn't improve it either. Pretty quickly after I started using this serum, I noticed a significant difference. While it's not gone by any means, there is definitely less redness than there used to be, the bumps are smoother, and I haven't had a single episode of burning sensation the whole time I've been using this. My skin can be sensitive but it really seems to love this. I notice a big difference when I don't use it. Overall, my skin looks healthier and better than it did 2 years ago. I mostly credit this serum.