I have used Stri-Vectin for about 5 years. I'm 55 years old. It's worked very well, and it's removed lines and made wrinkles smooth out. For it to be effective it has to be used correctly. I use a very small amount, and massage it in a circular motion (around the wrinkled area) as I rub it in. Building up a light friction seems to help. I noticed if I happened to use the hairdryer after using Stri-Vectin, it seems to magnify the effect. Instead of smiling and having several laugh lines on each sides, my skin in smooth. It seems to tone and tighten my skin. The wrinkles are still there, but it plumps the skin and makes the wrinkles less noticeable.
It didn't remove pen marks from leather jacket and leather sofa. When you rub it to much it changes the color of the leather but it doesn't do anything to pen marks.