Just picked this up second-hand, and was a bit reluctant as I've heard about lock-up bugs with the game. Well, so far, no lock-ups, but not since Advance Wars have the hours slid by so quickly. This thing is DS crack! Very addictive, but also quite tough (but easier than Advance Wars, and less frustrating). Anybody else a fan? And have any tips to share? I play it the way I would the PC version, but I'm guessing I should be using different tactics.