A little hard to apply because it's like water, runs down my fingers. Not irritating at all despite the high concentration, doesnt cause acne nor clogs the pores, however leaves my skin a bit shiny. Skin feels a little firmer, otherwise can't tell so far if it does anything.

I have used many vitamin C serums before, but this one dries me out like crazy. As soon as I put it on I feel my whole face tightening and it’s like a mini facial - for a while. However it’s very drying. 

I love this serum and find it boosts my skin. It's a very runny serum, but otherwise nice and lightweight on my skin, leaving it smooth and not tacky or sticky.

What I was not prepared for, and what I found INSIDE the cardboard package, was info that for best results, you need to wait 10 min before applying a next product. Since vit C should be used in the morning, you need to have a lot of time to use it (that's why I often use it at night.) It is watery and layers well. I hope it helps but it's difficulty to see any big results. I like the fact it does not irritate the skin even though it's 15%.

I honestly wouldn't mind paying a couple more €€€ and have better packaging. The pump system is nice, but it leaks. The VIT C itself is quite good. I had it for 2 months so far and it hasn't oxidized. It provides a morning glow to the skin and, with some time, it definitely improves texture and skin tone. I won't be repurchasing though, due to the packaging. I'll try other VIT C's within a glass bottle.

I have quite reactive skin and so far this hasn't caused any issues at all. I don't notice that I wake up super glowy after using like I did with a previous Vitamin C serum, so perhaps I need to go for a higher concentration now, but this is a good starter for Vit C newbies who are worried about reactivity.