[saganus]

I have the HD 4.50 BTNC and they are very good.

I compared them vs the QC35 I believe, and I loved that the noise cancelling in the Senn's were very good but also the audio quality was much better.

The QC35's had a pretty good sound, but it just lacked the "clarity" of the HD's.

The QC35s were a bit more comfortable and lightweight though, but since my primary use was the office I wasn't planning on putting on the headphones for more than 2 hours straight.

I have used the HDs for long flights and I do have to take them off after some time due to the weight and headphone cushion material.

They were also cheaper than the QC35s at the time, so all in all, for ny particular use case the HDs were fantastic. Also the battery is pretty good, especially if you use the audio cable + noise cancelling. I get several days of use that way.