I purchased 10 butterflow blue ball pens to make notes for cs executive exam. From the first pen itself the problem of "stops writing" started while the refill contained half filled ink. I changed my pen but the same problem occurred also with the second pen. So far I have tried 5 pens and in 5 among them I faced this problem. Worst of the worst and if the problem is not solved then I will go to consumer court redressal fill an online petition .