I've been using this product for at least 3 weeks and the results have been promising so far. It definitely helps brighten up the face. For me, I really noticed the results on my forehead because it looked more hydrated, elastic and firm there overnight. It helps lighten my acne scars a bit, but I think I will need to wait for another month to really see the complete improvement. Because it has a stickier consistency, I do recommend using it at night time. You can use it in the day time, but mind you it is quite sticky so it might feel uncomfortable.... If you put moisturizer on top of it, it is okay, but still a bit sticky. If you are going to use it outside in the day time, make sure to use sunscreen and moisturizer! I do keep it in a box in the refrigerator to help make it last longer. I'm really hoping that my acne scars will lighten dramatically in a month or two!