Faber-Castell is very common and very popular in the non-fountain-pen world. Their wooden pencils and general stationery are in almost every stationery store.
Their fountain pens are not as popular, however.
Although I prefer other brands of graphite pencils, I'm a bit of a fan of their fountain pens myself. They use a nib unit that fits all their pens, and it performs really well. Their lower-end pens use a nib that's suited for higher-end pens, whereas Lamy and Parker do the opposite!
I also like Graf von Faber-Castell. Their use of exotic materials really appeals to me.
I highly recommend Faber-Castell to anyone looking for a pen between $30-$80
Do you consider yourself to be a fan of Faber-Castell? How has your experience been with this company, and what do you think of it?