I usually rely on Paula's Choice azelaic acid cream for discoloration and skin marks, and I really love that product. However, I LOVE everything that comes out from Anua so I had to try this serum as soon as I saw it. I enjoyed the product: scentless, lightweight (maybe a little too lightweight?) and visibly mattifying. It doesn't give my skin that hydrating glow that other serums have. I think that's nice though, because I can layer this product with other serums/creams without it seeming heavy. I can't say much about the redness relief since I don't really have irritated skin. I typically use azelaic acid for sunspots and general skin improvement. Overall, I recommend the product, but think it needs to be paired with other Anua products for best results. For reference, I have normal skin with the occasional break out.