Hello everybody, Here is my summary for the FlexGrip Ultra Rectrabl 1,0M_blau: To purchase the said pen I came through my job in the office. For our annual inventory of FlexGrip Ultra was in black to specific persons (eg me) spent. As I write we can use with it on most surfaces, I looked for the same clerk in blue on Amazon. Now I have it. Since a couple of weeks in use and am more than satisfied One can without any fatigue of the wrist write, the writing is through the mine 1,0'er very nice and very readable. What is very important for my work: Even when underlining of words or the like running any color from the mine, not smeared. Very good! Mitlerweile I use it with both colors in the private sector. Should the writer be depleted, comes to me no other pens out of the question. I would recommend it at any time to anyone who sets great store by a beautiful and clean typeface. 5 stars are justified only !!!