With a brain age of perfect 80, i can say that this is a decent tool to joggle you braincells once per day. It would be more boring, if it was on any other device, but on DS/3DS it's a decent gimmicky title. It's fun, when you can rapidly answer simple math problems, but it is not fun, when game have constant issues with 8s and letters. Also, graphs become a little more discouraging once you unlock hard mode for certain trainings. Sudoku is also good implementation. And what's interesting, if you really invest to warm up your brain, it works! Or it doesn't... Sure, there are more effective ways for it, and it is not a panacea for your brain, but it feels nice to have a little warm-up before work, doesn't it?