M2 is no good pair with polarized sunglasses. Screen appears black in landscape mode with polarized sunglass. Haven't got the time to look for a working anti-glare/matte screen protector to counter the polarizing yet.

Had encountered screen touch issue < 4 times since one month of usage. This is seen even after updating to WW-15.2016.1812.179 (2019/01/09) firmware. Am on stock transparent case, will try a few weeks barebones to see if issue still persists. Had once encountered screen seemingly stuck (only power and volume up/down button works) and resolution was simply cleaning the screen.

Battery life is definitely great. Still daring enough to use Waze + Bluetooth even with 30% battery left and still not charging it.