I am allergic to a cosmetic ingredient called Dimethicone. It dries up my skin so extremely that my skin peels and turns bright red and itchy, and can even bleed. Dimethicone is very common in base products, especially concealers. I searched for weeks but just could not find any that weren't Dimethicone-based. FINALLY I found this one by Glossier and decided to try it out. It was a bit pricey ($20 including shipping) but I was getting desperate so I was willing to pay anything. And honestly, I am so glad I did! I am very fair skinned and the shade light is a near perfect match for me. It is slightly yellow-toned so it is great for covering redness. I use it all over my cheeks and chin, where I tend to flush very red when I get hot/embarrassed/cold/basically anything. The coverage can go from light to medium depending on if you build it up, and it works best blending with fingers. It's very nice on the skin and looks extremely natural, even when I build it up to medium coverage it still does not look like makeup. It covers about 85% of my redness and leaves me looking like I just have a healthy blush instead of looking like a red tomato. In my opinion you have to set it with powder to get the best wear out of it, it is VERY dewy so if you use it on your whole face like I do it will make you look a bit damp if you don't set it (but I suppose that look is in now so whatever floats your boat). I also think this comes with a lot more product than it looks like--When I first saw how shallow the pot was I was kind of shook. But I have been using it heavily on most of my face for just over 2 months now and although there is a noticeable dip in it, I still haven't hit the bottom of the jar yet, so I still have a lot left. The only negative I must add is that it creases when I put it under my eyes. This doesn't bother me because I don't wear concealer there anyways, but if you have a deep under eye crease like me and you wanted this to cover dark circles it might not work.