First of all, let me point out that I have sensitive skin and retinols are notorious for sometimes irritating some people's skin. I did not have this problem at all. After applying I do feel a slight tingling, but it's not painful, it's actually somewhat refreshing! I even put it under and around my eyes with no problem (slightly stingy here, but very slight and it went away quickly ). I saw an immediate superficial difference on my first application; my pores were tightened as was my skin in general.
Fine lines were minimized though my deeper crevasses were still visible; from what I understand about retinols, after about a month of use I'll see a big difference there too.
In the morning my skin has a glow after absorbing this overnight. I've been using this over a serum and alternating using this under my eyes with an eye cream. After about 3 weeks use, I'm seeing a vast improvement in my skin's texture and evenness and the fine lines are really lessening across the board. My skin feels soft and plump and looks good even without makeup. The circles under my eyes are diminishing and tightening. To get the best out of this stuff, make sure sure your skin is super clean and exfoliated to really absorb the benefits, though this will help with exfoliating and getting rid of dead cells. You can also use this on areas that you feel need a youth treatment, like gnarly old lady hands! (guilty as charged!) I also recommend applying this to your neck and chest for an even look from your face down. These oft neglected areas are actually the worst for showing our age, so treat them well! This is a HUGE bottle, so don't be shy about applying this liberally.