I could see immediate results upon using the Dark Circle Corrector serum. I put a little bit under each eye and there was a marked improvement. I wait a few minutes and then apply my makeup and my face as a whole looks much brighter. I have ordered two more tubes after my initial purchase. It has become part of my makeup routine. Even on the days that I don't wear makeup, which is more often than in the past, I use it to make sure I have a fresh look.
Bottom Line: Yes, I would recommend this to a friend