I was lucky enough to be gifted this product from Skinceuticals Community, to test and review, and to share my honest opinion about it. I must say that at the beginning, I was quite confused about this product. How to use it, when to use it, how to layer it. But after the first use, I was hooked. It is an instant skin-smoother, it brightens the complexion from the first use. I am using it 2-3 times per week, and a few drops are enough for an application. It works wonders with Age Interrupter Advanced applied over after 10-15 minutes. It really made big changes into my skin’s appearance, it corrected lots of imperfections and I dare to say that it also balanced my skin a lot. One wonder product that really worths the investment!