Just as Ivanus I wanted noise reduction, and got just that, it takes away a lot of noise in the lower frequencies, such as fans and motors but transmit less persistent sound like speech (which is not the noise).
Sure, they are not as insulating as the Bose-over ear for 3 000kr, I have tested but (for me) oppressive feeling that I got with Bose I can not empathize with them.
The quality of the sound is really good, much better than my Sony in-ear for 300kr, not comparable with my ATH-M50 but similar sound, clear sound with force in the low register, almost a little too much bass .. but only almost.
The ear cups for comfort and do not wander out of the way my Sony headphones only thing that bothers me is the location out of the battery pack, a little more cable up to the snails had facilitated but for 600kr, it is a really good headphone with nice sound that then there nc only makes it better!