I habe been using this pair for more than a year now. Till now not a single problem has occured.
Build quality:
The build might look not so sturdy at first and you might feel it can get torn away with sligh rough use. But believe me it won't. I don't take care of things that good and yet it has lasted me for over a year.
I always put these in my pocket without arranging. But yes they are not tangle free.
You will also get two pair of extra buds in the packet.
Sound quality:
I wouldn't say the sound quality is top notch. But it is really balanced. The bass is adequate and vocals are really good. You won't face any problem while listening to bollywood or pop songs.
But when you move to metal or blues, you might find the sound to be little mixed up. The highs are not that separable.
But one in a hundred person would bother for such minor flaws.
Overall it has more than decent sound quality.
Call quality over mic:
This is where it excels tahn other competitors.
The quality of call through the in line mic is really good.
Final verdict:
If you need mic and not a fan of extra bass and your budget is under 700, then blindly go for it.