The only downside to this serum is that it tends to go bad really fast due to exposure to light and air. My last bottle only lasted about 3 months before starting to change colors (kept it in the fridge in the box it came in), however I'm going to decant this one into a smaller container every once in a while to minimise exposure. That being said, this truly is a solid buy as you can see results pretty much immediately, it mimimises pores and makes my skin super glowy