Wow... Penis extension. Jeezuz
I have one, uh, Desert Eagle .50, not a pen... never mind.
Anyhow. It was created to fill a VERY small niche: a semi auto for hunting medium and larger (don't think bears, I said larger) game. It is very well made but somewhat impractical unless you have that niche to fill, or really want one for whatever reason. Not much different than guys who have rifles that will shoot 3's or $20,000 double barrel shotguns.
I do have one though seriously. I don't have that niche to fill however. It's for sale.