I actually bought one of these from the KitschBent store not to long ago (
http://store.kitsch-bent.com/product/gb-boy-colour) I wish I had waited 1 month >.< Anyhoo, I've been playing Link's Awakening and Final Fantasy Adventure without any problems
(It's played every game I've thrown at it, even flashcarts!) Backlight is SUPER nice and bright (It uses an actual LCD screen and not LED light's like the backlight game boy mods) and the console feels ALMOST like the original Game Boy Color. I say almost because it's slightly bigger and buttons are not shaped the same.. But it's really not a big deal at all! From what I understand, the one with the built in games are harder to find than one with no games, but after what
Yingzhaxi has said about those... I don't think they would be worth it especially since they can't play Pokemon :/ I can honestly say I recommed the game-less ones 100% I was thinking of buying another one and painting it to look like the original DMG Game Boy (the grey brick) At this price, I might just get it...