At first I was curious as I've never used in ear headphones, after trying different size (3 sizes) and trying to figure how it keep in ear (not so clear instruction imo). The sound different is visible when you listen to any track with high base. I kept switching bet my LG Viewty headphone and this headphone and it was pretty clear which one was better.
I was so glad with the headphone's rich sound that I no longer care my phone had no sound equalizer.
My only downside it after keeping in ear for an hour or more can be uncomfortable but never the less sound quality is rich.

I've had alot of headphones because seem to break quickly.
But these headphones are just Brilliant.
Their cheap, reliable, fit in eyes perfect with no hearing outside world and the sound is top quality, and their comfortable.
Suggest buying these headphones! you won't be sorry
Try not to lose ear pieces because their quite expensive to replace.

these are excellent headphones for the money. i have various types over the years and these are by far the best.
They are very comfortable and come with 3 types of silicon inserts for different sizes. just a shame i bought these for £45 instead of the now price of £15. ;-}