Brain Age 2 review at Gamespot.

"Brain Age 2's subtitle tells you almost everything you need to know about Nintendo's new mind-flexing sequel. It's "more training in minutes a day." The structure and presentation of Brain Age 2 is functionally identical to the previous game, but this time around, you'll see different training minigames. This means it's perfect for people who played the first game and are looking for more."

Full Source: Gamespot