I remember this being a staple for couch co-op whenever I had friends over in grade school. Not many games were as fun as Nintendo Land with multiple people who didn't often play video games. It's an extremely polished collection of minigames, while not as iconic as Wii Sports; I'd say Nintendo Land is a rival in quality as far as console pack-in titles go.
Highlight for me was always the Luigi's Mansion game. The Wii U made screen cheating fun.