I have a huge nine inch scar on my residual limb from when my leg was amputated. When I go swimming or have my prosthetic off it is extremely noticeable and it bothers me. Even though my leg was amputated five years ago this is one aspect of it that I still haven't gotten used to or fully accepted. There is a lot of scar tissue under the actual scar and that's something that a scar treatment product is not going to be able to get rid of. The Silicone Scar Tissues are easy to use and apply to the skin; since the scar I was treating with this product is long and thin I was able to cut the sheets in half length wise and use them on the scar when I had my prosthetic and silicone sleeve off. I usually used them at night before I would go to bed so that I could have the sheets on the scar for five or six hours at a time. They can be used for up to one week before you will need to use a fresh sheet. You get a small storage case with the sheets so that you can store them so they are clean and free of dust and lint when you go to reapply them. After using them for a month I did see the scar lighten in color but it wasn't completely gone. I bought another box and used it for another month but it wasn't able to completely get rid of the scar. For smaller scars I am sure this product works more effectively than for something like a deep scar from an amputation. I would recommend this product to people who have fresh scars or scars that have not darkened. You can't use this on a scar that is still in the healing process; if there is a scab or any leakage from it the product will not work. There's no pain or tingling when using this on scars; the adhesive doesn't pull or yank on skin when you are removing it. You should remove it when you are taking a shower, swimming or if you are going to the gym because if you start sweating the sheet will start to lose its ability to stick to the skin. Effectiveness I'd recommend this to people with fresh scars.