These phones generally have rave reviews.
When I first tried them on one of my projects. it sounded flat, narrow and with little energy, so basically, they 'told' me what I needed to hear :-)
However, in the summer months since I have owned them, after an hour or so, they become uncomfortable and make my ears / ear surround a bit sore.
Aside from this, they are very good and what they claim to do, they most certainly do.