yes, yes. I know, I know. This is a sub for fountain pens. However this is a question about those rollerball pens that use fountain ink.

Has anyone used one of those before? How well do they work?

I'm asking because my BF does not like the fact that you can only use Fountain pens in one direction. He's kinda one of those eccentric science guys, so he wants to be able to just grab his pen and start writing without worrying about it's position.

I'm trying to convince him to buy one or two of these fountain rollerball pens because 1) I think it would be cheaper in the long run and 2) I won't feel so guilty about wanting more than one bottle of ink at a time.

Opinions?