A Wonderful Experience
It's difficult to say anything new about Eternal Sonata, as it has been available for many years. However, it still stands as one of the best RPGs on the 360: a wonderful, unique experience enhanced by its art and music, and a better game for containing itself within 30 hours, instead of needlessly diluting itself by padding out to 50.
There are a couple of better J-RPGs on 360 that you should get first, but after Lost Odyssey and Resonance of Fate, this is another delightful journey.