I bought it for home work to dim playing child/robotic cleaner and/or to listen music without annoying others. I immediately started using it for calls (even old school ones).
Passive dim is good, could be 20-30 percent better. Active is excellent, unfortunately I can stand it only for half an hour, hour tops (not a product issue, I'm just more sensitive to it than others, which was the reason I wanted product with strong(er) passive dim). Surround mode is seemless and practically perfect, switching is easy and intuitive.
Control is very intuitive and has optimal sensitivity, but the fact that it is only on right side is a little disappointment, I tend to use left hand more for this purpose, or simply the hand which is currently free but that might be just question of habit,. Still i wouldn't mind paying extra for both sided controls.
Sound is excellent (I mostly listen power or symphonic metal or background instrumental). Battery seems as strong as advertised. Wireless range is strong, covers whole apartment easily.