I drew this with my Flexion Erasable Pen, but it didn't turn out as good as the one I did with my non-erasable Micron Pen. Hmm. Interesting. The ink in the Flexion doesn't flow as smoothly as I would have liked and the tip isn't as thin as the Micron. You can hide thin lines with the Micron, but with the Flexion you can erase them. I actually prefer the Micron, but if I make a mistake then I'm SOL. Start over! lol
I think if you want girls to look pretty, the Micron is better because it gives a more feathery, softer look than the Flexion. If you draw a guy and are not concerned about making him look pretty, then the rough, scratchy, more spontaneous look can be better achieved with the Flexion.