This game is the direct sequel to The Legend of Zelda:Ocarina of Time. The storyline is the best so far of any Zelda game, as it explains a few things you may be wondering about the series.
The fighting system is basically the same, although they've added a new 'parry' system(you press A at the right moment to roll/jump behind the enemy and strike them).
The graphics are smooooooooooooth. That's all I can say about that!
The sound is great, and you'll be humming the tunes in no time.
Replay-wise, there's really nothing, but you'll go back in your old game to get all the other things you've missed(heart pieces, bottles).
All in all, an awesome addition to an epic legacy that just keeps getting better and better.