I saw my first Nook Glow today, but I was not impressed. I thought the light was not that even and it bothered my eyes. It also had a blue cast to it. I started seeing pale halos around words. This does not happen using my Sony 350 or T1 in the lighted cover. Nor did it happen on the Nook once I turned the light off.
With the light off, I prefer my Sony readers to the Nook screen.
I'd like to see the Kobo and Kindle interpretations, but it may be this kind of lighting is not for my eyes.
I like the idea of a lighted reader, but the Nook didn't convince me