I have the Hydrapen H2 and GA Hydrapen is more expensive. Atleast the H2 comes with several ctrgs. I like using my H2 every other day using .25mm to push my cocktail in. I love to Nano my vit c in. Once a month depending on my skin I will use a .5mm which goes pretty deep. Next time I use it I’ll record & share. ✌🏼🥰✌🏼