It's my first time using any Vitamin C beauty product, this product has improve my skin texture feeling a lot smoother :) This is just my take on this product it could be different for you. 

i like this serum a lot, it works better than the Klair's one!

Сыворотка с витамином С, выравнивает цвет лица, устраняет "серость", вызванную употреблением кофе, курением и жизнью в загазованных местностях. Убирает воспаления, рекомендую на осенний период

reduces pore sizes. love it. 

I love this serum so much. It does help brightening up my acne scar, but make sure to always apply moisturizer because this serum is a bit drying for my dry skin.

thought I liked this at first but then I realized it broke me out. Does not smell good at all. Stains my hands orange after applying on my face.

I use it as a night serum; wake up with a brighter and clearer skin.  

this is currently my second bottle of this product!! really does help with calming down my acne and brightening my overall complection!
 

Good product. I will buy it again.

I used half the bottle so far, but I dont really see a drastic change or whiting in my skin. It works, but I really hate how it is super sticky. 

My skin (combination type) can absorb fast this serum but at the beginning of using, I feel a little bit itchy 

Oxidizes very quickly. Recommend to keep in fridge. 

It's a little bit too sticky to my liking. I find the serum quite harsh, as it makes my face red and itchy after application. I only use this once in a while during my night skincare routine.

I've only been using this for a couple of weeks but I think it's been helping with brightening my skin and lightening scars.

I bought this because there was a massive hype surrounding it! "The miracle in a red bottle" and I've been using it for a week now and I think it has really helped with my skin and complexion! I recommend it to all my friends!

I recommend this serum! It works quite a lot in my skin

Unfortunately the consistency is a bit too thick for me, however might work well for others.