I bought a White Lamy Safari, Medium nib, from Century Pens in Chicago about a year ago. I am so pleased with it that I use it pretty much every day. The nib is smooth and as you said, consistent no matter the pressure you apply (pretty thick stainless steel nib). I tend to be a heavy handed writer and the nib has held up very well. The entire pen is of sturdy construction with a cap that snaps on securely and slips tightly over the barrel when posted.
The entire pen is made of smooth plastic, including the grip, which usually means for a slippery grip. But, there are two well placed cutouts for your thumb and pointer finger. These grooves have a bulge near the nib and both work well to stabilize the pen in your grip.
I've tried it with five different inks, using the piston converter (which works as well as any other screw type piston converter). All the inks worked well, though you could really see the difference in each inks character. In order of highest to lowest ink flow (but, lowest to highest color depth) are the Waterman Black, Pelikan 4001 Brilliant Black, and Aurora Black. The Waterman comes out grey while the Aurora is my favorite because it is a deep black.
I have also tried the Private Reserve DC Electric Blue. Great flow and a deep, vibrant blue that is consistent throughout a stroke.
My favorite ink in the Safari though is Waterman Purple. Great flow, great color, though it shows a bit more character than the others with variations in depth throughout lines and strokes.
One complement I have for this pen is its ability to hold up to blue and purple inks. Many pens I have used stain, and you would expect a white pen to be particularly susceptible, but any color that gets on the pen usually comes right off with water.
Edited by juderb21, 25 December 2008 - 07:30.