Wonderful game! I personaly love Advance Wars (although, I love Fire Emblem much more) and think that it is one of the best games for the GBA (if not one of the best EVER). This game is clearly inspired by Advanced Wars, however makes this game makes the style its own. I highly recommend this game to those who love strategy, outwitting their opponent, and clever game play.
There are a few flaws, such as when you move a target you don't move then attack (like you do in Advance Wars). This creates problems for someone who is used to Advance Wars because you often move a unit close to the enemy, but fail to attack. This just gives power to the foe and I found myself restarting a few times. You quickly (after restarting 20 times :P) learn to move correctly.
Wonderful game and I look forward to playing the sequals!