I got these headphones just recently and so i am unable to help on how long they will last, but from first impressions, i was left speechless!
I own a samsung f400 music phone, and so the quality from it is very good, but i didnt know this until i bought these headphones, as my previous headphones (skullcandy inkd, which only lasted 3 months!) were very harsh and the high ends hurt your ears after a prolonged perioud of time.
But when i plugged in these i could tell instantly that they were immense quality headphones! There is great loud bass, but it doesnt make you cringe with pain. The vocal clarity is also unrivaled, and you can easily hear every instrument used.
I would happily reccommend these headphones to anyone for any kind of music, either classical, rap, metal or even folk (but you can get them cheaper, so try other websites first).