I got this game for my children both below 12 who both need help in math. The idea of them playing this on a DS was interesting to me and i want to see how it plays out. So far there is great success as the girls are interested in playing and it seems like they are learning some things here. The good- the more they play this game the more used to numbers they will be and also be able to rattle off simple equations quickly. This game covers adding, subtracting, multiply, and dividing. The game does it's job and does it well. The bad- there is a learning curve. there are only 4 games to play and while the levels go up if you can not grasp a game you are screwed up a bit. When you start to play it i suggest starting out slow and get used to not getting right the first few times. the in game instructions are not that good so it helped when i played it first and then showed them.
So enjoy this game if you want to get help in math or get your child some help. It will take a little interaction with you and the child to show them how to play the game but that shouldnt be a big deal.