Solid controls and content from GC and PS2 makes the Wii version a "must-own" for those who missed it
Not much has been improved on the graphics aside from widescreen support but that doesn't mean the graphics are bad at all. The graphics are still good for a Wii game and with widescreen support, it should look a little better than the Gamecube version. Cutscenes look good and the game overall looks alright.
The sound is pretty good as well. At times, the music in the game will have the "creepiness" to make you feel scared and I must admit, it does a good job at it. I've had times where I was a bit worried about going forward because the music and the environment looked creepy. The enemies sound great, some enemies will utter words when they spot you which will alert their nearby friends and other enemies will utter creepy phrases over and over again. All in ll, I think the sound in the game is great.
If you haven't played Resident Evil 4 before then this game is a definite "must-own" but if you're a Resident Evil fan and you don't mind buying the game again then it's also worth it just to try the controls because it's really great. If you're not a Resident Evil fan and you beat the game before then I don't think you should buy it unless you've got $30 to spare.
Overall, I thought the game was fantastic. Those who own a Wii and never played this game before have no reason to buy this game. It's great, it's cheap and the controls are fantastic. I loved every single minute playing this game and I'm sure a lot of people have too