The red guide in France and Italy contains information about many restaurants, not just the stared restaurants. After three editions in Tokyo, I would have expected this guide to follow its established European structure. Instead we get a version that is almost identical to the 2009 edition. There are some additional restaurants, but the selection is still limited to stared restaurants. The book is not bad, but it should have been much more improved third time around. Thus only three stars.
The restaurants covered in the guide will serve you some amazing food so the guide is a must for the well-off foodie traveling to Tokyo. If you already own the 2009 guide not so much need to upgrade, but since the book costs less than one 20th of what it costs to visit a stared restaurant, you might just as well buy it :)