I am very Pleased!!
I was worried that even the Olive backlight would cause my Gameboy to look non-stock when in the daylight.
But when I put it in, the panel's color when off looks so close to the original you can only tell it's not original when next to a stock Gameboy!
I am also very pleased with the color of the light when playing in the dark. It looks exactly as I imagined a backlit DMG Gameboy should!
The installation was a little hairy, but the screen's ribbon cables held, despite the tension I put on them. Once the backlight panel was dropped in, it was a simple re-assembly.
I'm just using the stock power regulator, we'll see how it holds up over time.
This was a junkier Gameboy I wasn't too concerned about breaking worse, so if it does die, it's not too much of a loss. Coincidentally, the very slight extra width the backlight aided in removing some dead lines on the screen by adding just enough pressure to the ribbon cable-LCD junction!
It would be fun to try some of the other colors if I get more Gameboys.