Well, got the cans yesterday, and have to say, I am pleased
I am using them primarily for 360 gaming, they provide a nice crisp sound, with a small amount of hiss which i found can be minimised with some fine adjustment of the tuning wheel on the headset, although this hiss is in no way overpowering or overly noticeable when engrossed in whatever you are doing
Not a massive amount of bass on them, but they serve my purpose completely, and although they are the entry level 'phones, with AAA batteries instead of a charging cradle, i cant fault them for the £20 i paid for them, sound is clear and sharp and as loud as you would want it
They are my first ever pair of wireless though, and as such i have nothing to measure them against in terms of sound quality, but the build quality is excellent, and they beat the bananas out of sitting there with my wired headphones on, forgetting the lead coming out of the telly and then standing up, only to wrench my ears off (yes, that happened quite a lot)
All in all, v pleased indeed