Contra 4 review at Nintendo World Report.
"When I first heard that Contra 4 was being developed for the DS, I doubted that the game would be any good. However, it turns out that my fears were premature. Not only has WayForward (under direction from Konami) created a game that I can wholeheartedly recommend to fans of classic Contra, I'm even prepared to recommend it to everyone else as well, although not without a few caveats."
Full Source: Nintendo World Report
