I received a sample of this product and purchased the full size based on how amazing I found the sample to be. Dark circles disappear and my eyes look brighter and bigger. The formulation is really comfortable (I apply with fingertips) and lasts well. A little goes a long, long way.
I've looked for and tried so many products to disguise under eye circles, although not perfect, this is the best concealer I have found to cover them. It can be a little oily, I have switched to a less oily eye cream which seems to have helped a lot. One tube lasts a long time, good value for money.