D...
Review confirmed by purchase 
I've been using it for a long time. It certainly isn't a product comparable to those costing four figures, but it's actually really good equipment. +: Sound insulation, (operation of) active protection, sound quality, microphone, adjustment and switch, the ability to detach the microphone, and lastly, the option to swap the band for helmet adapters. -: No option to detach the jack, it's annoying if someone doesn't use it. I think after the warranty period, if they're still working, I'll cut out the jack to be able to reconnect it when needed.
