Surprisingly Good.
Like the Kinect sensor itself I am blown away at how good this software is.
This is not a game, thought it has achievements and some 'game' modes. When you first boot up Your Shape, it takes you through a simple procedure to establish you age, general fitness and what your goals are.
The recommendations presented for me have proven to be ideal so far and I am enjoying my routine. After less than a month I am already feeling the benefits of my personalised program. It takes less than half an hour of my day so I am able to fit it into my schedule.
Routines are divided into three sections. Personal training which contains workouts to help lose weight, gain energy, muscle or tone.
Fitness classes, including Zen, a section with taiji and yoga that is ideal for a beginners, those with interest or for cooling down after a personal training section. Fitness also includes a cardio boxing section.
Finally gym games, which are mostly just for playing about and showing some Kinect features, but I personally really enjoy the 'Virtual Smash' boxing mode that's also a great workout.
The DLC is not available to the Chinese English version for some reason. Though it mostly seems to be catering to the female demographic, not a problem for me at the moment but if more for males comes out or my wife's interest continues this may become a problem.
Still, this was the reason I bought a Kinect and so far it is proving cheaper and more convenient than joining a gym (something that bores me intensely) so I can spend money on a complementary activity like Kick Boxing.