Tell me about xBox 360 Kinect please

[origami]

We are thinking about getting the xBox 360 with Kinect for Christmas. Pros? Cons? We have a Wii already and we would move that on to our smaller television mostly for the benefit of being able to use it for watching Netflix.
It seems like there are more family-oriented games for the xBox 360 now and we are thinking that the Kinect feature sounds cool. Obviously, there's Just Dance 3 and Dance Central. Which would you recommend between these two? And what other games? (We're probably not getting the pet games as we can't have a pet right now and these games make our kids want a puppy or kitten even more.)