I have and I quite like it. Sure it isn't spanky rock tracks and it doesn't keep score or give achievements but it's involving and rewards you if you persevere. Many of the games I love get low scores from one reviewer or another who just don't 'get' them .. .. .. Wii Music also got 91%, 89%, 88%, 83%, 80%, 70%, 58%, and 25% (not all of the list, just a sample). Which one is the most accurate? They all are as they are the personal opinion of the reviewer.
So that's one Nintendo 'kiddy' game .. .. .. .. .. any more you can name?