Is this AIO ampoule the greatest thing to ever happen to skin? No. (That'd be sunscreen.) But is it a really good value for a really good product? Absolutely. This ampoule is fast-absorbing and inoffensive in smell or texture, and provides decent hydration and extreeeemely subtle brightening (that's more likely an evening of the skin tone due to hydration). For the size -- it's a quarter of a liter, guys -- you really can't go wrong.