I use the pens to write me little notes, to-do lists or shopping lists, or to impress me things from studying and learning so. They are therefore used almost daily. So far, the pins write very clean, can be removed on the whiteboard well and last a long time. At work we have used the same pins every day and after a year they still have just as well written as at the beginning. The storage box is also very practical and stable. I will if they eventually buy out me again.
