Writes good, but expensive cartridges

Since I had just finished my state exam writing in search of a pen that makes a lot of writing something pleasant.
With this pen to write for a long time is actually more pleasant than it is with a pen or pen. So far I have written with a Waterman fountain pen, or a Lamy pens.
Although after a few hours writing also occurs when Stabilo a fatigue in the arm, but not nearly as bad as other pins.
Not so super is that due to the indentations for the fingers, it is quite uncomfortable, when you hold it even slightly wrong. That's just the style owed, but at much writing it can not always be avoided that the pin sometimes slipped slightly.

Note, however, that the cartridges are extremely fast empty! With a cartridge I'll just go an exam (about 20 pages). After that the pen writes, although still with no dropouts, but the stroke thickness is noticeably thinner and above all, he does not move more easily over the paper.
Each cartridge costs at least about 1, so I think that's very expensive. For my exams I do not care, for daily use would write me it that not worth, just as one since it need not write so much at a time. For the permanent use of the pen seems however not to be made anyway. You notice after a short time that the softer material of the handle does not last forever. Although this is in itself not so bad, but at the high price, one should nevertheless consider carefully the acquisition.

A total of 4 points since the most important function, a more comfortable writing, will be achieved.