The dermaroller is as described. I think this length is good for general improvement of product penetration in the skin. If you have nice skin already and would like to incorporate this into your beauty routine, the smaller sizes offered are adequate. It doesn't hurt when rolling, and I push a bit hard into the skin. You can move up gradually to 1.0 then 1.5 mm and over time, for more serious skin correction, you can choose longer needle lengths. After derma rolling I either use the collagen cream, anti-aging serum, or face mask. I sanitize the dermaroller before and after use (I spray it with rubbing alcohol mixed with sanitized gel and water and store it in the case it comes with). I also always do my treatments at night to avoid wearing makeup after dermarolling so the makeup wont be stuck deep down in the skin, and lastly, I do not overdo it so skin can heal and produce collagen. I do it once every 3 weeks.