I bought one of these about 10 or 12 years ago at an office supply store. It has a #6 nib, didn't come with a converter but had included 2 international cartridges of blue and black ink. My pen is a two-tone (red/black) finish, and the section is truly comfortable for long writing sessions. It accepts large international ink cartridges.
The Medium nib was a tiny bit scratchy, but I smoothed it out by drawing loops on a brown lunch bag for less than a minute.
I had one problem with it, the ink was drying in the nib. I noticed there is no inner cap, and there is a hole where the clip is attached to the cap. So I filled said hole with a couple of drops of wax, and voilá, no more problem. Another detail is that my pen (which is probably an older model) has a nib unit that is fused together and impossible to disassemble. Also the cap cannot post securely, although is not troublesome since the pen is kind of large in length. It's comparable in size to TWSBI diamond 580 & Faber-Castell Loom, but with a nice bigger nib and very comfortable section.
I still love my Aldo Domani, and is still writing beautifully to this very day.