one word awesome!
i've had it a few days now and i have to say its one of the best gaming products i've ever played on over the last 20 years! kinect adventures is a great free bit of free software that helps you get to grips with the motion sensor device - and works really well, 1000 leaks and the rollercoaster game being my favourites! The other stand out games so far are kinect sports, dance central and your shape fitness.
I'm really supprised how accurate kinect is- try out table tennis on kinect sports- with a flick of the wrist you can add back spin, swerve and all manner of different shots.
My advice is if you have the space to move ( a good 6-8 feet) go out and buy it- it really is one of the best motion sensor device out there- and being a wii owner i can honestly say that it has much more control than what you have with the wii remote.
Plus you can scroll through the menu bars with a flick of the wrist or voice recognition, also includes face identity -tracks up to 6 faces and live online chat through the device itself so no need of the stupid head sets anymore!