I just bought a set of the new EarPods - in advance of my new iPhone 5.
In a word, they are GREAT.
I wasn't expecting much, but compared to the old ones the sound is much fuller, clearer, louder and with much more bass. They also stay in my ears.
Sound technicians may not be impressed but I certainly am. Well done Apple for spending so much time and effort on redesigning them.
I just wish they could figure out a way to make the wires more manageable - mine always seem to get tangled.