I use it in the bus on the way to work. It is a good change of mind and rush of senses to answer all the puzzeles. But somehow I find Brain age express- math and brainage express arts and letters more interesting. I don't know if all those contents are in this game cartridge, have to find out after playing for many days and see what all new activities will be enabled. But for a non-VIDEO gaming gamer, this is a good thing to spend time with when -- wife is busy selecting clothes in the mall, and you need to accompany- in commutes taking more than half hour- in airport and doctor office waiting- mid-afternoon break at work- while enjoying an hour of sunshine on lakeshore in the parkIt is addictive for 20 - 30 mins, then starts become a drag, but if you leave it then, you feel refreshed and alert. I love DS and these games.