Hi,
just to say I have mine since march 2009 and it still works fine. I kept the mobi firmware and it is very stable since last update (a long time ago).
I offered a Kobo Glo to someone and I found out that the G3 screen is still good enough, just the resolution is low but the contrast is quite good.
The Kobo has a a screen border that makes a shadow on the screen, not the G3