I am new to the Medik8 line and although I have only been using the Crystal...

I am new to the Medik8 line and although I have only been using the Crystal Retinal 3 serum for a short time and recently transitioned to every night, I have been very pleased with the product. It may be too soon to know if it's working on wrinkles, etc.; however, my skin has not had any adverse reaction. I have not had any drying or stinging as I followed the directions for use on the package. I will purchase another of the Crystal Retinal 3 once this is finished and then move on to the next level. I am very happy with the Medik8 line.