Pros cables, price, sound quality
Summary M9 has a solid feel and an impressive sound. this is great considering it is a $20++ earphones. The cables are very durable and the design is also good. The unpleasant thing about M9 is the micro phonics but as long as you are not always on the move it will be okay.
These earphones are good substitute for free earphones included in most cellphones and music players. It dominates the $20 price level. If you want cheap good quality earphones, this is for you.