This is an amazing game but this version is utterly broken and unplayable.
Not only does it add virtually nothing to the preexisting game, but introduces and whole new range of game destroying bugs that render is a complete waste of money. CANNOT INSTALL GAME TO HDD, the loading time between areas are outrageously long and when does finally 'load' the texture pop in is unbearable. The audio is a laggy, glitchy mess, some quests in the game are lat out broken and any Smartglass features mentioned on the box are completely absent.
With the Xbox One now released, it is likely this garbage edition will never be fixed so DO NOT BUY.
If you want to experience what was a fantastic game, try a version that worksDeus Ex: Human Revolution (Xbox 360)