I fell in love with the Lamy 2000 as soon as I picked it up, so don't expect an entirely rational opinion! Harry Potter had his wand, Arthur had Excalibur, Vader saw that Luke had constructed a new lightsabre and thus that his skills were complete. I feel the same about a nice fountain pen. The Lamy 2000 is a design by Gerd A. Müller; a leading advocate of the Bauhaus movement, which first shipped in 1966. It's a prime example of form following function. I spend a great deal of time working with modern devices whose lifespan is best measured in months; it's pleasant to use a tool whose design, while modern, hasn't changed in half a century.
The pen feels utterly excellent to hold thanks to a shape that isn't slippery or obtrusive. Even with big hands, it's very comfortable to hold for hours on end. The superb design even extends to the choice of materials. The barrel is made from Makrolon, a kind of fibreglass that doesn't seem to get sweaty, cold to the touch, or overly warm, while the nib section is made from brushed stainless steel which is appropriately weighty and smooth, and still easy to grip.
More importantly, the pen writes wonderfully with a cursive hand, although my medium nib digs into thicker paper a little. I don't really bother with fancy inks: a bottle of good old-fashioned Parker Quink Black works great, plus it dries quickly. Ink is impelled into the reservoir using a barely visible screw comprising the topmost inch of the barrel. The mechanism works well; it draws in enough ink for a thousand-words-a-day writer to recharge the pen once a week at most. The barrel features a translucent window which lets you monitor ink levels, although if I have one criticism it's not immediately obvious when you're about to go dry.
The thing is, I could wax lyrical about the writing performance of this pen and its design, but what I most adore about it is its complete discretion. The Lamy 2000 is not a showy, pretentious pen which people will comment upon. Rather, it feels like it was designed to be a great writer's pen; a statement to the world that it is the words which matter more than the hand.
I love it and I implore you to buy one.