I purchased these strings not really knowing what to expect. I don't change strings often. I play songs I like, mostly by ear, and in this sense I'm certainly an amatuer, and I also might not play my guitar for weeks at a time. I say this b/c for me, picking up my guitar and having the strings in tune is a very nice thing. Of course, when you put them on they stretch like crazy like all strings, but since they are 'broken in' i haven't had to tune them in some time, despite pretty agressive strumming and plucking. Anyway, I felt these strings did the job, were easy on my fingers and are lasting a long time.