I was always a bit put-off by the fact that you have to buy the clip for this pen as a separate item. Sketchy.
That said, I have a Kaweco Dia2 which is simply wonderful. Their steel nibs are super-nice. They are quiet and smooth.
Beware of cheap Chinese counterfeits. They are out there. I bought a Kaweco from Holland only to find the nib scratchy and blotchy; and a clip that reads “Kawec”.