Not at all value for money. Unfortunately, it has nothing to do with rotring even remotely. At least it doesn't stain and the tip doesn't break easily, although after a short use it has a slight tilt.

Very good value for money. Note that you need to also purchase the ink as it is sold empty without ink. It is also positive that you can find replacement tips of all sizes on the market, which can be adjusted to the pen's body, at very affordable prices.

As soon as I saw the product, I thought it would help me with my exams. In the end, it doesn't even have ink inside and it doesn't do a good job. I suggest not to buy it.

Unfortunately, I chose them because of their very low price. I had bought them in the past as well. I think they are disposable. After you put ink and draw, they don't redraw. The ink doesn't come out evenly