Cut to the chase stunning sound. I am picky with around 10 pairs of headphones ranging from Sony, Beats to AT. Also an ex audiophile coming from full on active Naim Audio system. Reason for mentioning that was the way Naim exerts grip, control, detail and ease rarely phased.
This sums up the headphones, never experienced this sort of deep controlled taut bass on headphones coupled with a clear midrange- normally one ruins the other.
The sound level when you attach the right size buds is shockingly loud - at max phone and headset zero distortion.
Plus you get all the notifications and crap s voice. Can take calls not tried says has two microphones.
Negatives, neck surround it very hard and stiff, ear buds do not totally seal and on my set BT occasionally disconnects but worst of all an ongoing BT skip every 15 - 30 seconds.
Hope I can solve the connectivity as even my cheap mpow have zero BT issues.
All that said an awesome headset.