the BT will briefly turn on Ambient NOISE and quiet the music so you can hear everything as if you are not wearing the headphones

The music is clean and natural with ANC on

I could not hear the loud engine sound resonating throughout the cabin and still could enjoy music while not having to turn up the volume all the way.

The music sounds great all around great head phones

I forget the gear and the source and just enjoy music the way it should be.

I have rated them four stars so far as I very nervous that these will break as many other people have posted in other reviews.