I'm not necessarily the biggest fan of the X Factor, but I have to say I really enjoyed this. I have a friend who's a reviewer who leant me the disc, and I have to say it's probably the slickest DVD game I've ever played.
Sticking closely to the format of the show (taking you through the individual rounds to the final), the gameplay was nice and varied with a lot of clips and trivia, both about the show and music in general.
Playing this with my young nieces, I really liked the fact that the first 3 rounds get you lives in the grand final, as even though their music knowledge wasn't the best (they are 4 and 8 after all!), it meant that they could be involved all the way to the end - in other games their enjoyment would have ended within 5 minutes, which was most definitely not the case here.
All in all, a great family game, which I can't recommend highly enough!