This is the phone that brought me to the IEM crowd. After a few weeks using this I was hooked. Bought them on a trip to Hong Kong on an impulse, I was with a friend who was getting a LOD for his iPhone + amp + Westone 4 setup. We asked about budget choices besides the Klipsch S4 he was used to suggesting and the vendor said we should try the Shures. Great value, I have upgraded to a W4R and even when someday I jump to the customs ship I will keep the Shures, they are perfect for running.