A great game to play with little siblings or kids that arent as good at most games or the platforming. The 2nd player co-op was perfect for my little sister and brother when the game released. They loved being able to help Mario. Such a great game. Really wish they had done a Mario Galaxy 3 for Wii U.
I completely second this. Also great if you have a significant other that isn't really a gamer. My wife enjoyed doing the 2nd player co-op with me.