I am a drummer and i bought these to use as monitor headphones when recording in studio and use them for mixing especially for the effects (reverb etc). Right out of the box, the plastic material and ear pads look a bit poor quality at first, but the extra telephone type cable and the golden plated screw-head jack extension is pretty cool. It doesn't fit tight on the head, it's pretty loose, so it's a bit uncomfortable when playing drums; but it won't be a problem for a guitar player, a pianist or a singer. It's also very poor at sound isolation. This becomes a trouble for especially drummers, you hear all the acoustic sound when playing. Again, i don't think it will be a problem for other musicians. The sound quality is very good. Very detailed, clear and crisp highs & mids, and stunning performance at lower frequencies. These babies give you lowest end your ears are able to hear, without distortion... The impedance is so low that it blows your head with the volume and still no (or very little) distortion. Very good choice for vocals, wind instruments, guitars, keyboards etc; drummers better look somewhere else though...