The sport that coin rush creates -- a sort of coin op -- actually adds a lot of replayability and reason to become more efficient. A big step to making Mario the Starcraft of America. Let's go, plumbers.
The 3D pops out almost as much as I would want, even though portions of the background should have more detail (especially during boss battles). At least the colors are glorious, which makes the simplicity of the design feel more pure and classic.
Having it digitally gives your 3DS the benefit of always carrying a major league title that everyone can enjoy. The convenience adds a little more variation for long trips through big cities. Since NSMB2 is able to load extremely fast and includes shorter levels like SM3DL, it becomes a top option for train rides and other busy situations in translation.
Nintendo finally has begun to utilze the internet to an acceptable capacity.