Hello,
I wanted to write in about my experience[so far, a few hours worth] and sentiments[also, so far] about these headphones. These things are quite amazing. [edit-after listening to something I know very well] These things are unreal...!
[edit-three hours[one charge lasts this long] isn't long enough

There is a sound quality here and it's good. I would have trouble expressing or explaining this quality, but I do know a good sound when I hear it.
I have a set of AKG 701s and Senheisser HD 600s. The sound from both sets is okay but I had a problem with the fitting from both of these sets, a 'long' face I have, so the phones were always too high and too tight-the 600s were impossibly tight and one can't change the tension on the band at all, otherwise---crack! so in a way I suppose I never really got to 'hear' properly.
The 701s are a bit easier.
There is another thing. These are wireless. They use a technology[a high through-put[4.3gb/s[? am not sure]] transmission so the quality[it is 'cd'] to the headphones is high. They're comfortable too.
A happy listener,
keeto