I've been using a dermapen and dermaroller for about 3 months now. The thing I've noticed is that my pen (DrPen A6S) doesn't penetrate as well as my roller. I did record a slow motion video and it does go back and forth as it's supposed to, but for some reason I didn't feel anything. I even went as deep as 2mm but I didn't even bleed. It's like when the needles touch my skin they bounce back. However, I bled much more with the 1.5mm roller, and with the roller I felt like the needles actually poke in my skin. Anyone feel the same?