I own and use these earphones, and have felt compelled to write my own review as I see a lot of negative comments on here like "no bass" and "broken" etc.
The first thing you need to do when using new "in ear" 'phones such as these is to fit the LARGEST buds available. This will ensure a perfect seal between the foam rubber and your inner ear canal, prevent sound escaping (which leads to poor sound quality and annoyance of others).
Another popular misconception is loss of sound quality.
What are we listening to?. If it's highly compressed mp3 files through an iphone, ipod or similar consider the source material. If you have downloaded a bunch of songs or albums from the net, the chances are they are going to be of a low quality due to a low bit rate.
If you put garbage in, you'll get garbage out!.
A lot of downloadable music has that fluffy, fourth generation "tape of a tape" sound to it. I personally only rip my CDs at the highest possible mp3 bit rate : 320kbps. Even then, listening to my original CDs I can hear a vast difference that the compression and conversion of music files has caused. But, you cannot carry 5000 Cds about with you all the time!.
Remember: high quality headphones will reveal imperfections in the audio source!. A similar disclaimer used to appear printed on the back cover of a lot of CDs back in the '80s, but I digress.
Another way to consider this, is by watching some beat-up, scrunched ex-rental VHS videotape on a 60" HD 1080p TV screen, it won't look (or sound) pretty.
Hopefully, you get the idea.
And for those that manage to break your headphones after 5 minutes?
...you must be the kind of idiots that after removing your 'phones, proceed to wrap the cord around your mp3 player so TIGHTLY as if you are trying to squeeze the dear life out of it!!!.