Close to perfection, but not quite. It sticks to the original Zelda formula, but offers some interesting new things.
The game starts off slow with Link living a few days in his normal life before he has to set off to do an important errand. Without giving any of the plot away, I can tell you that on the day when he's about to set off on his errand, things go out of control in a way one could not possibly imagine. The event sets the stage for the journey ahead.
The dungeons in this game had plenty to offer: they were the largest dungeons I've ever seen in a Zelda game. It starts off with the traditional Forest, Fire, and Water dungeons, but then branches off into a Mansion at the top of a Snowy Mountain, or a City in the Sky, and even includes a dungeon that gives the greatest sense of nostalgia to anybody who's ever played Ocarina of Time. Each dungeon has it's own unique item which ultimately ends up being used to help you defeat the boss of that dungeon. Items vary from things that you've seen before in previous Zelda games, but can be used in ways you've never seen before, such as the Iron Boots being used to cling to magnets on the walls or ceilings, and the game introduces some items you never seen before.
Between dungeons, you'll find yourself traveling across the fields of Hyrule. You'll instantly notice that Hyrule is also bigger than in any other Zelda game. If you were to travel across Hyrule on horseback, I would estimate it taking about a half hour of real to get from one end to the other. It would obviously take at least twice as long if you were to travel on foot. Luckily, for those who do not like to explore the fields of Hyrule and are just playing the game to beat it quickly and move on, you're able to use various portals to warp from one point to another at will in later stages of the game. However, if you warp, you miss out on a ton of collectible items such as heart pieces, or things required for side quests.
Now for the part people wonder about: "But how do the Wii-mote controls affect the game, and how tough is it to get used to?" In three words, the controls work. To swing your sword, you just need to give the Wii-mote a quick flick in any direction, and it's just as quick and accurate as a button press. You assign items like the bow to the D-pad and B button, and you use most items by pressing the B button. The obvious description I'll give now are the controls for aiming the bow. Imagine using a mouse on your computer, and think about how easy it is to point at any part of the screen. That is the ease that the Wii-mote brings to aiming the bow. Instead of using a sensitive analog stick, you now just point and shoot, resulting in much quicker and more accurate shots. Many people will gripe about the Nunchuck being unresponsive when trying to do a shield bash (moving the Nunchuck forward) or a spin attack (moving the Nunchuck left and right or vice versa). A simple solution to that problem is to just hold the Nunchuck attachment upright like it's meant to be held, and it works just fine.
A very notable thing about the Wii-mote is the built in speaker. If you leave it on its default volume, the sound that comes from it will be terrible. To make it sound a bit better, turn to Wii-mote volume down. Also, if you just want all of the sound to be on the TV or surround sound, then just turn the Wii-mote volume completely off. I played through the game with the Wii-mote volume off, mainly because I just wanted my sound to be on the TV.
The graphics in this game are quite impressive. The water effects like flowing water and waterfalls look absolutely beautiful. The most work in graphics takes form in Link's appearance. Link has to be the most detailed thing in this whole beautiful game. I was not let down by the graphics at all. And you have to keep in mind that this is game is ported from the Gamecube and looks like this, so just imagine a game built from scratch for the Wii.
The music in this game is great. If you hear anybody saying that the music is terrible for any reason at all, then just ignore them and listen for yourself... they're just grasping for straws. There are some new songs for the soundtrack in this game, but plenty of familiar tunes also found their way into the game, although I won't elaborate because of the chance of spoilers.
All in all, I'd say the Twilight Princess is a very well-built game. It has an amazing (and long) adventure leading up to an epic final battle. It has great graphics, sounds, and controls, and offers a lot of puzzles and large areas to explore. There are plenty of hours logged in just to get through the game, and plenty more if you're going through and getting every item (without any kind of guide mind you), or just stopping every now and then to appreciate some of the detail that was put into this game. The game, although not "perfect", still hits home and delivers an epic journey filled with tons of exploring and numerous plot twists.