I have tried a couple of sets of these string and I must say I am very disappointed. The sound, when the strings are fresh, is good. But compared to its predecessor EXP, which I had been using for many many years, the XTC last considerably shorter! I would say the XTC only last one third of the previous lifespan. I don´t know why so few people are experiencing this or pointing this out...But I will try me best in finding an alternative