I use these headphones on my iPhone, it really is the day and night with the original headphones.
some remarks of use:
1 - these headphones are also insulators than earplugs. Advantage: you can listen to music in the subway, even classic, without being bothered by ambient noise. It's really amazing. But beware, this can be dangerous when you walk in the street or other. So be careful.
2 - the headphones come with different tips. if the tip does not fit your roof, you will not hear any bass. For me, the tip that best suits is that foam