I have been getting sculptra treatments to treat some deep acne scars. It has taken four treatments, but at least I see a difference and the great part is that I look younger (aging and acne scars is not a good combination). I had horrible cystic acne (before accutane was available) and had some pretty deep rolling and boxcar type scars. I did CO2 laser when it first came out, and it helped about 20% once the swelling went down. Over the years I have tried lots of things. Last year I had scar revision which was painful, expensive, and yielded NO results. At least with this you can see something and it does fill in the scars. But it does take at least 3 or four injections over a period of a month to a year. The good thing about sculptra is that it lasts a long time. I will never be scar free, but this has been a helpful treatment with no down time.