[sgwizdak]

I actually never cared for the noise cancellation on the QC-35 II. I did use it on planes though. I liked the feature a bit better on the earlier wired model. I think Sony has a comparable product where it has a finer grained toggle of the inverse wave.

[kalal]

I am not expert, but if you don't use noise cancellation you would probably do better with standard headphones where you pay for the sound quality instead.

[sgwizdak]

The QC-35 II's were great for concalls. You can connect multiple devices at once via bluetooth and the mic quality was quite good. For music, I agree there's lots of better options. I've now using an external microphone and some wired DT-770's, however it's not a great portable solution.

[kalal]

Bluetooth is great up to the point when you want to have video in sync with audio. For video/audio editing or even gaming it is a problem.