I just bought the qc35 for Dxb-Lhr flight. I used the headphones whilst on holiday with mynipad and think they are excellent. Some complaints online about Bluetooth range but it worked for me across 3 rooms fine.
However I couldn't get them to work in BA club the 2 prong adaptor doesn't fit as BA use I think 3.5 + 2.5. I couldn't get the single 3.5 to work either

If anyone knows a solution or where to get a 3.5,2.5 adaptor please let me know