I was very impressed by using this acid the first 2-3 times. Then, I realized that the impression is because of the silicone contained in the cream. I did not notice any change from using the cream. At first, I told myself to give it a try and was so patient using it the whole bottle of 50 ml. Nothing happened though. The only thing I feel good about the cream is how it makes my skin feeling so smooth (again, because of the silicone in it).
I think it is too expensive to spend this much with no significant improvement. Really, think twice if you are buying this one.