I have Momentum 3 and I'm quite disappointed. Sound quality is cheap, I get headache & hot spots after a couple hours, and there are issues with stuttering (bluetooth) or completely cutting out (bluetooth, USB) as well as noise cancellation randomly turning off and sometimes music playback stopping. These are the first pair of headphones I need to reboot every once in a while. Also sometimes they connect in a weird state that gives very shitty sound quality, again resolved by reboot & reconnect... Sigh

Having to fold them to turn them off is just silly too.