I’m 99% done with my first MM build and I have to say, the light bleeding on the LCD makes the part of the mirror where the screen is located pretty useless as a mirror.
I actually recycled an old laptop’s LCD screen, so it still came out great, but during the building stage, I first positioned the screen on the top and then realized how bad the light bleeding was, so I flipped it upside down and positioned the screen on the bottom instead.
OLED monitors would cost more, but I’m guessing they would make a beautiful MM with their higher contrast capability.