Get healthy and earn some Gamerscore
The biggest pro is that you will actually work up a sweat after pretty much every routine. If played on regular basis, not only do you rack up Gamerscore for achieving calories milestones but you will also see results in muscle tone, weight loss, and endurance even.
Some of the cons is that the presentation and menus are plain and barebones, but that might not be a bad thing since it allows the player to focus on performing routines and not being distracted with what's on screen. Some of the moves may not be recognized by Kinect sensor as well, leading to a bit of frustration as the narrator derides you for not performing correctly. The game also doesn't keep track of how many session you do for each routine if you switch from one exercise to another one, which breaks up a sense of progression.
Yourshape Center companion website is a great idea, introducing social aspects where you can set up challenges and compete with friends. Community events are a nice touch as well.
Overall, Your Shape Fitness is a great first entry in Kinect Fitness game category. It's easy to get started with and challenging enough to keep even the most in shape individual sweating. It introduces community features that show a lot of promise to expand the genre as well. If you would like to get in shape, this game will definitely help you do it, because it simply works well and is effective despite a few annoyances.