Together with the same pen in EF size, this one in F is my favorite ballpoint. The letters appear slightly bolder than the EF but still thin. It is very reliable and the ink lasts a long time (over 100 pages, if I count correctly). There is no issue with smudging. (Only in terms of comfort, it's so-so because compared to a fountain pen or a gel pen, a ballpoint requires more pressure and tires faster). It flatters small fonts a lot. Worth buying again and again.

It writes very nicely and smoothly, but it runs out of ink very quickly. I used it for half a day and it was finished!