i didn't think this would be much different from the other vita c serums i've tried (and i've tried quite a few) but this one i like enough to use consistenly and see a difference. i had a tan i wanted to get rid of and feel like this definitely sped up the process. the formula is super light and quick absorbant which i really like as well. keeping it in the fridge also gives a dream cooling sensation. would purchase this again as my vita c serum!