I've seen so many great reviews for this and my BFF has even endorsed it, but I just thought it was okay. I tried using the product alone, with foundation, with powder, with both...all unsuccessfully. It left my already prone to dry skin looking way too thirsty to become a makeup bag staple for me.
While I felt it only made my under eye circles look more conspicuous, it did give great coverage to blemishes. (If you have fine lines, beware. This seemed to draw more attention to mine.)
The tube is pretty small and comes with a spatula for scooping, but it seems to go a very long way.
It comes with detailed instructions; ie. warming the product between your fingers, where to apply to cover dark under eye circles, etc.
If you don't have dry skin, this product could work great for you. I don't love it enough to repurchase though.