I have heard mixed things about them. I herd they break easy and the cord is thin and it can tear kinda easy. I do know they have a lifetime warranty on them, so if you just send them in the will send you new ones.
A friend of mine has them that I ride with all the time, and I used them once. They have good sound. I guess it just depends on what you are looking for. If you want something at a good price that sounds good and your not gonna be super hard on them then they are good.
I am really hard on headphones, I ride my motorcycle just about every day and I listen to music all the time, riding, at work. I always have them with me, so I coughed up the money and got the shure headphones again and couldn't be happier.
All you can really do is buy them and try them, if you dont like them bring them back and get something else.