Simple Review!
1) Single Player- The single player is really good, i found it really refreshing, very laid back, the ranking system is actually good. The microphones are awesome. The lights on them is really cool. The notes and pitch register perfectly. Only bad thing is that there is no career as such. You just sing without and sense of progression.
2) Multiplayer- Pretty darn good. Two player vs and co-op is really fun, and the added mini game, for example, time bomb and vocal fighter makes it really fun. There is no online, except if people on your friends list have the game, you can challenge them at a song. All you need to do is sing the song twice each. This is actually really cool.
3) Graphics- Fine, nothing really to say here.
4) Sound- The sound is pretty good. And the microphones register your voice really well.
5)Gameplay- Same as the single player section really.
6)Achievements- For those who are interested the achievements are good, some fun ones, and also ones that require some time, like getting to the highest rank etc. I have around 650/1000 in a couple of days.
Overall,the game is defo a buy. Really fun, especially with parents/siblings/friends. 9.5/10