Ok, let's be honest here these products are quit expensive... I was VERY apprehensive about this brand as a whole and their products UNTIL I got this serum. I had a huge dark spot right above my lip which made me look like I had a dark mustache, and I had very low self esteem over it, then my mother said" do you had a mustache Do you need to wax or shave?" She wasnt being mean, just trying to let me know, but then I told her it was a dark spot...at that point my self confidence completely went away, I always wore makeup even to check the mail box. I had tried 100s of different brightening creams,serums, ects. you name it.. and then I said what the heck, and bought this. I dont write many reviews on brand pages, but this serum deserves a lot of recognition. Within the first week of me using this, the dark spot was very much lighter than what it was... so I kept using it day and night and by 2 weeks.. IT WAS GONE!!! I ran out a few months ago and only recently bought another bottle that I haven't opened yet and you know what??! THAT DARK APOT STILL HASNT CAME BACK!!! I am so impressed with this serum that I also bought the Aqua Booster and will also leave a reveiw once I'm finished with that bottle. So... over all yes, these products are expensive, however they are not as expensive as going to a dermatologist AND they actually work, and they work quickly and as of now leave permanent results. Thank you so much 111SKIN for giving me my confidence back to go makeup free!!