This board markers are slightly more expensive than I originally expected. I ordered it in September 2013, and today, to February 2014, none of them is "Swallowed". As I record video tutorials and put online, I can say that these pins and practical - are clearly visible - except for the yellow course. But what exactly to look for a yellow pen on a white board, I do not know, and therefore I can say that these seven pins are really top for meien purposes. The tips are not spongy and chanted so far from not, as unfortunately was the case with my previous posts.
Conclusion: Top quality at an appropriate price (which one is accustomed but also by Edding).