It's so effective that if you use this, you won't need any other product. What's more, I was so surprised by the immediate effect and the change in the texture of my skin after just one or two uses that I fell in love with it and have since repurchased the largest size. It doesn't specifically target anything, but it improves everything. I wanted to repurchase it, but the largest size is a better deal than the refill, so I ended up buying it. After thoroughly moisturizing with makeup, three pumps are enough for my face and neck. I use it morning and night, but I feel like the effects will last even if I only use it at night. It's fast-acting, but I also feel like it has lasting effects.