It's incredibly easy to use, and produces a wonderful line. If you've been curious about fountain pens i highly recommend it. I use a medium "nib" (tip), and it produces a nice thick line equivalent to the more heavy flow consumer pens like the Uniball Vision.
Why is it that when the typical ball point pen sold in USA runs out of ink I have to replace the entire thing: the body, the ink tube, the tip, the clicker, and the 2 springs?
Yet, when my pretty unremarkable Japanese ball-point pen runs out I just grab a replacement ink tube & tip?
When my lowbrow Lamy Safari fountain pen runs out I just replace the ink cartridge?