I would like to leave it at 'awesome' but I don't suppose that is good enough.
Bass is STONKING!
I am hearing notes on music I know well that I never heard before.
Suddenly the volume on my IPOD has expanded - I don't need it at full tilt.
Superb value for money and I should know - I've bought enough damn ear phones.
And they sit in the ear, so if you have small ears like me they are very comfortable.