The mini skin roller is a nice way to try out the serum without having to buy the big size, before you know if you will like it or not. I do not necessarily see a difference in the texture of my skin or wrinkles or anything like that, but as far as just being moisturizing, it seems like it does a good job. The tiny roller would be a good travel product, or once again just a good way to try out the product and test it out.