Awesome sound quality! Uses these now as standard headphones for music and work. Is cruelly picky when it comes to sound, especially when it comes to music but I like these better than for example Sony's mx3.
Large, nice, open and separated sound image with deep AND punch in the base both wirelessly and with cable.
Light years better than my previous headphones from Logitech gs933.
Minus: battery life a bit stingy at about 8 hours.
Hacks sometimes, probably due to comhem router.
Highly recommended otherwise.