The grip is very good, fluent writing, the ink dries quickly and the ink regulator controls the flow.
For my part, I have a preference for V5 (extra fine point) which allow a very precise writing. I only use the basic colors (black, blue, red and green) and have never had to complain about the quality of these pens.
Warning: the new version of these pens do not really allows to see the level of ink remaining (see photos).