I replaced my damaged QC3s (they were 6 years old) with the QC25.

After ten flights with them I'm happy with the the noise cancelling and the fit remains comfortable despite me wearing glasses. The sound is good, much better than the standard in ear headphones you get with the phone although they don't reach the quality of the B&Ws I use at home. With an empty battery it's ok - perhaps slightly lower quality than the standard Apple in-ears.

The only strange thing always happens during take off: as soon as the engines are at their loudest a clicking noise as if the NC somehow gets overloaded. I can't remember this happening with the 3s. Do you experience the same thing or am I the only one?