I got this primarily for the backgammon feature. However, I cannot get the doubling feature to work on the DS (it does have a game boy advance cartridge slot). The right button works on other games but not this one. Without doubling, backgammon is no fun.

My sons (aged 6 and 8) play the chess game as much as they play any of their other GameBoy games. Both learned to play chess on a physical board prior to using the virtual version. The chess pieces actually battle each other, which seems to delight them. My husband, a rated chess player, says this version will keep them challenged for awhile.

More recently, both boys have been playing checkers, too, and they have asked me to teach them backgammon so they can play the GBA version. I highly recommend this chess/checkers/backgammon combo because it's a great value.