Up until less than a month ago, Ocarina of Time enjoyed its status as the best Zelda game of all time. Well, Nintendo didn't just unseat OOT with this game, they knocked it out of the park.
Twilight Princess is in a league of its own when it comes to Zelda games. It combines the best aspects of OOT--an expansive game world, a great storyline, lots of huge dungeons--with the gameplay of Wind Waker and a deeper, more "adult" plot. The story-telling here will actually have you (and any observers) rivited, not wanting to put the game down until after the next cutscene where more of the intricately woven plot is revealed.
The game's world is massive, easily 4 times the size of OOT's, the graphics are supreme even for a title that doesn't take full advantage of the Wii's capabilities, and the gameplay itself is a refined and perfected combination of OOT's and Wind Waker's. If you are lucky enough to own a Wii, having this game in your library is a must. You will not regret a penny of the purchase price.
So far this is the best Zelda I've played. I currently at the snowpeak mountian at the mansion.I just got the ball and chain. I'm glad they finally to have the whole game as an adult Link. I highly recommend this Zelda as a must have for the Wii or Gamecube whenever that comes out.