As for NSMB2, This game is a bit different from the other Mario games. As an New Super Mario bros game its relatable to its line of games. But as a Mario game itself, its completely different. The goal of the game isn't really to beat the game but to collect the most coins within the game. When you collect enough you get a gold mario statue on your main-screen which is pretty Awesomtacular. I've yet to get this statue because you need to earn like 1 billion or something just to get it. The game itself is fun and you'll love the end level too. But not nearly as fun as Coin Rush. Where you try your hardest to earn the most coins within a time-limit and no deaths or you end the challenge. For Gamers, its a real treat of a challenge! On a scale of awesomeness though, its not the BEST Mario game ever. But if your a fan like me, its one to buy definitely.
And if you like Super Mario at all, then why not buy the game that started Mario Month?
I recommend playing this on a 3DS XL if you can because its much easier to view it all as it happens. When SSB comes out I'm sure it will also be easier to view on the XL over the regular. But again, thats only if you have the option to play on an XL or not. All for now,
Game On Gamers!