It's been my regular wallet for months, far superior to the cheaper Wenger PadFolio I was using before. But I immediately replaced the Rotring with a Fisher Black Titanium Bullet Space Pen. The tip of the Rotring seemed sturdy enough for breakage not to be an issue, but I didn't care for the pen's ink, which required too much pressure to flow onto the paper as soon as a started to write, which was irritating, since I'd often have to precede my note with a small scribble to get the ink going. The capsule form factor of the Space Pen would probably be a better choice for you aren't reassured that the Rotring's barrel will hold up under the pressure of chair sitting.