Contrary to "Formula", I must say I have never come to grips (no pun intended) with Omas. Also, I only have one Omas and it is the only one I can opine about.
Indeed, I don't "get" the "gripiness". I expected a smoother behavior from such an esteemed brand. Moreover, with time the transparent material has turned ever slightly yellowish. I used this pen once, didn't appreciate the way it wrote, cleaned it and put it away.
Different strokes, etc., I guess.