Summary: I go this to help my 7 year old with the basics of math. It works great for his level and is not too hard. I use this game as a way for him to build credit time in other games. For example he has to do 5 rounds of addition and subtraction to get 1/2 hour of free time on his DS. It works well because he still believes he is playing a game, and in reality he is practicing his math skills.
Summary: My son and now my daughter (4yrs) have really taken to this math game. When in the car it is a great entertainer that helps them learn. Not some senseless game that wastes their valuable time.
Summary: I bought this for my daughter who is in 3rd grade when she needed to memorize multiplication tables. This may be the only purchase I've made as a parent that actually achieved the goal I hoped it would. Believe me, initially my daughter was not thrilled with the idea and was horrified that I bought her a "no-fun" math game for her DSi. Nonetheless, she now loves it because it has a cute, little animated Japanese guy who encourages her to achieve to the next level.
Summary: This has been a great purchase for my 1st and 2nd graders to review addition and subtraction facts. They will also be able to use it when they advance to multiplication and division. It has been the best math fact game we have come across.