Our daughter got this game as a gift from Santa. She really enjoys singing the songs, and mom and dad even join in on occasion. We've only used it so far in the default 'sing it' mode, rather than in one of the competition or duet modes. The videos that accompany the songs are either clips from the movie with the character singing the song or a montage.
While there are a lot of song choices, some of the songs are conspicuous by their absence from the game. For example, "Under the Sea' is the only song from The Little Mermaid - odd when one considers that "Part of Your World" seems to be on every Disney song collection. Also, "Be our Guest" while a good song, is quite hard to sing as there are frequent pauses for dialogue which have to be gotten out quickly. Meanwhile "Beauty and the Beast" is MIA. Perhaps the Mouse's Marketing Machine is saving those for a Vol II?
My only other qualms are grown-up ones - there is no way to enter a player name into the standings or select a personal Disney character (at least in Sing It mode, the only option is to be Player 1 represented by a picture of Tiana)....odd when it should be a simple matter to allow individual players to enter their names and a picture next to a score (for example, Hasbro's Game Night has had this feature for years, among others), particularly as the game frequently pauses to save game data anyways.
All in all, the game is fun and I'd recommend it. Should be a blast at the next birthday party.