I've had every game boy since the original - in fact, I still like to play my original Tetris game.  I loved the improvements that came with Game Boy Advance, so I was excited when dh gave me this as a gift.

Unlike every other GB incarnation, this one cannot play all old cartridges - it can play most GBA ones.  The new cartridges are TINY - literally a thick postage stamp size - and can be hard to keep track of.  Some integrated storage would have been thoughtful. 

The adult games that are available are nice - I have Brain Age and Big Brain Academy.  Both were interesting to play for a while. ...