I just got this pen and I like it a lot. It takes the mini international fountain pen carts and writes really smoothly. When this cart runs dry, I've got a nice selection of inks I can fill it with.
Not in pocket, but on the desk is a vintage Pelikan 400NN in Tortoise, with a OF (Oblique Fine) Nib. It's inked with Rohrer & Klingner Alt-Goldgrun. A really fun combination!