Received it yesterday and been using it and testing it just as normal mp3 earphones and damn, i can't wait to use them while playing drums and stuff like that. The outside noise isolation is really good, the sound it self, i would maybe prefer for it to be more powerful. Other than that is SOO clean and good, feels almost spacial in some cases.
Took some time to find the right sleeves and all, but after you get used and set up, u'll love them.
The only thing i would complain about, even though i totally understand, is that it's not that easy in the beginning to put them on, specially if you have glasses like myself. I already found the position i need, but it still takes me a bit every time i want to put them on.