Comment by bayindirh

Uh, no?

The feed buffers enough ink allowing you to change the cartridge or refill the pen before it runs completely dry though.

Also, I tend to use a small cartridge between three weeks and a month depending on the nib size. Considering I fill my notepad in six months, this is plenty of ink. When I write with a gel pen, the ink level is visibly different when I finish the day, so there's that.

If you use a Lamy or use long international cartridges, these durations are at least doubled (6-8 weeks of writing per cartridge).

If you fancy to see the ink level, some pens have windows, and demonstrators are clear all over already. :)