Build Quality: The first set of metal headphones I've owned and I am very pleased with the toughness of them. Very sturdy feel to the drivers themselves, a reassuring pop when changing the ear buds and the gold-plated jack feels more than adequate. The cord over the cables is a very nice touch and stops the usual tangle in your pocket.
Listening comfort: A non-intrusive style (for me anyway) the buds don't go in too far and create a very good seal that enhances sound quality and lowers sound leakage. They come with three bud sizes so they will be suitable for most ears. The lead is plenty long enough to reach jacket or trouser pocket.