Really great! Not only do you roam as Link, you get to roam around as Wolf Link!
Zelda Twilight Princess introduces a new story into the Zelda Series, with better graphics. With 2 bad guys, instead of just Ganondorf. It introduces a "new" Link. When engulfed in Twilight, Link Changes Form into a Wolf! Have all the qualities of a wolf you must proceed to save Hyrule of Twilight.
With brand new items and new equipment, Link must face even more/harder challenges than he did in him past adventures (Ocarina of Time, Oracle of Ages/Seasons, etc.), with new bosses, new characters, and another annoying person that follows you =).
Zelda Twilight Princess was originally made for Gamecube, but everyone knows it's better for Wii. Maybe the Wild Side isn't so bad...