Picked mined up yesterday, here's some comparisons with the Sennheiser M2 Wireless for anyone else thinking of upgrading
Earcups are slightly bigger, i had to do more fiddling with the M2s to get comfortable. These I just put on and go. There's also no discomfort for me while wearing glasses
Headband is softer and more cushioned, doesn't leave as much of a stripe on my bald head!
Sound quality is a massive difference and, like most, the first thing I thought was they weren't very good at all. Having left them with pink noise over night, they are better and I'm quite enjoying their sound now and it'll no doubt continue to improve
I too have experienced some quirks with the wear sensor, it gets a bit out of whack if adjusting them too much on your head and I've had some random power-offs for no reason. Since doing a factory reset via the app though, it's been perfect
NC is pretty good, I'd say it's on a par with the M2s at office level. 'Voice passthrough' only really works for me on 'Amplified' but I've left it at the default as not bothered about that feature
Connecting the USB-C to a Pixel means I can charge and listen via bluetooth at the same time (with APT-X HD), which makes me feel better about the lack of 3.5mm jack on the Pixel 2. Disconnect the bluetooth and it plays audio via the USB-C connection
The one annoying thing for me right now is that, while they pair and connect to my PC running Linux, it doesn't detect as a headset so I can't use them with my PC at all. Not too bothered about this though as my bluetooth dongle, which has APT-X, doesn't use APT-X from linux anyway so it's better quality just using my phone.
I was unsure at first purely because of the sound quality but the more I use them the more I'm happy with the upgrade