This is a very light product that spreads easily and absorbs quickly. Non-sticky and non-greasy, it feels smooth and silky. I am also on board and agree with the brightening claim. My skin tends to be blotchy with plenty of post-acne dark marks... and I feel this has totally helped to lighten them. There is still plenty left, but when I look in the mirror I don't think they are as pronounced.
SK-II isn't cheap, this bottle cost me $70 CAD. Granted that only small amount is used every night, and so I hope this will last me for at least 7 month... in which case the price is bearable.