Do you like Suduku's? If you do, just that should be enough for you to own this game. Did I say there were many Suduku's

User Rating: 9 | Brain Age: Train Your Brain in Minutes a Day! DS
Although, most reviwes seem to indicate that this game being repetitive is somewhat negative, I feel that is oddly enough the positive aspect to this game. First, it's hard to classify Brain Age as a traditional game. As Dr. Kawashima says when you initially setup your personal account (4 seperate accounts can be tracked in the Brain Age), your body needs training to stay in shape and so does your brain. So, you have to see Brain Age more as a mental exercise tool. Brain Age tests you short term memory, long term memory, fast calculation abilities, and other general brain uses such as recognition of patterns (especiallly usful for Suduku's) In summary, if you're looking for a game to simply have fun, this is probably not what you're looking for. On the other hand if you want to test your mental abilities and try to improve them over time, Brain Age is a must. Also check out Brain Age 2 which has even more exercices.