A fun campaign and the best multi player ever on a ds INCLUDING BOTS as well as wifi make this game well worth it.
After I did some campaign I decide to explore the multi player options. It has single card play, multi card play, and wi-fi. Single card play is fun with friends, and wi-fi is even better. But if you're ever at a place with no w-ifi, and none of your friends are with you, you got multi card play which allows you to face bots.
The option mode is pretty cool to. For controls you got options which allow you to really change it up. As I said before, I don't really like playing with the stylus, so I simply changed to the Right-handed mode, which let me use the control pad to move and x,y,b, and a to look.
Any bad stuff? There are only two things. You can't save it any time you want on campaign, and it can take some time to kill sometime even if both of you are shooting one another, but hey, every game has a downfall.
Conclusion? The game is definitely worth it, even if none of your friends have it. If you convince your friends to buy it, you'll have one heck of a time. Even if they don't, 4 of you can enjoy it with single card play =D. Buy this game!!!@