"Not the best."1.5 starson by bodogfight
Pros: The customer service of Etymotic rocks. I called them to see if what I was hearing was normal. They sent me complete replacement kit containing new earpieces. They were great.
Cons: I have 5 iAudios, 5 ipods, 1 iPhone, 6 Sony Walkman, 2 iRivers, 1 Creative. These are tolerable in the iAudio and Sony playerst. I also own Shure E2c, Woodies, Skull Candy, Vmoda, Sony Noise Canceling and Klipsch headphones.
Summary: If you like thin, treble-y sounding phones...these are for you. If you like any warmth or richness...go with the shures, klipsch or Sony.