Pretty close to a perfect sequel to Pikmin 1. The management and strategy gameplay, music, and visual style are absolutely fantastic. As a side note, it probably as the best end sequence.
I also find that Bingo Battle is the most enjoyable and engaging multiplayer mode in the series.
My only real complaint is the lack of any real stakes. Most bosses and enemies are pretty easy once you figure them out, and finding enough fruit to survive is a bit too forgiving. The characters are also not as interesting as Olimar was.