This was the very first game my husband bought and finished for the Wii. I think he said he spent 45 hours completing it (apparently that means something to gamers).
The graphics were amazing, considering the Wii was reported to have 'inferior' graphics when it was released next to the PS3. The controls are extremely intuitive, and the game itself is amazingly entertaining. My husband had the stick-to-itiveness to finish the entire thing - I just fished.
But even fishing was so much fun. With the Wii-mote, you pulled your arm back and flung it forward, like a real fishing rod. The controller rumbled and shook when a fish was caught on the line. For just a minute, I felt like I was really fishing on some strange, foreign lake.
There are also oodles of mini-games within the game. I'm sure my husband would have finished sooner, but he was able to keep our oldest daughter occupied by handing her the controller and letting her play some of the little games (like flying around while attached to a chicken).
This was another huge plus to the game - it wasn't particularly gory, or particularly adult, so our kids could sit transfixed (and QUIET) while my husband played. It also kept them occupied long after the game was turned off. Three girls, running around playing 'Twilight Princess' was just too cute, and well worth the $50 we paid for the game!