Just finished my La Mer lifting serum which I frankly do not see that much "lift". So I decide to try this product based on positive feedbacks from MUA, and gosh, it really works. My skin has improved a lot after 2 weeks using it. Get the 100ml bottle, it's totally worth it . I strongly recommend this, with just 4 drops a nite, you will very soon get nearer to clear & smooth skin. I will definitely buy this again.