First I want to say that Dr Pen is amazing. I have 2 of their cordless pens. This is my first time trying the H3 and I use it specifically for the nano heads. So instead of using my older pen for both the needling and nano-ing, I know use this solely for nano. Which means it's being used more often. 1x/week. Straightforward and easy to use the skincare plump effect and the circulation after use is awesome. You really wouldn't believe the difference it makes until you try it.