I've used this product for about 20 years and still love it. I have a large facial port wine birthmark, and it's the only conceler that has worked to cover it completly. It's water proof for swimming, easy to apply, and a small jar lasts for about 3 months. The only thing I don't like about it is how thick it is. But to get the coverage I need for such a dark birthmark, it is needed. I can apply thinner layers for lighter spots but have to apply it fairly heavy for my darker area's. So it looks kind of caked. This company makes a liquid type, that may work with an cosmetic airbrush. I hope to try it someday to see if it will cover and yet not looked so heavy on my darker areas. Overall, the cream in the jar is excellent and I have tried just about all the different brands on the market for birthmarks and still go back to this one.