Although the controls take some getting used to, it's good while it lasts, but doesn't have much replay value.
The game starts out with you parachuting into the battlefield. You do have some control over where you land, and it feels cool, but if you land near the beacons, you get a medal. You also get medal for things like not dieing or lots of head shots. The controls are all explained as you use them in the game on the first level, and after it tells you how to do it, you can do it yourself. You can skip these if you want, but they help if it is your first time playing. Aiming is done by pointing at the screen and it works really well and is fun to do. There are 4 different motion controls on the Nunchuk, and it sometimes doesn't recognize your motion right, but it is a good thing you can turn some of these off, so its not too much of a problem. After a while you can get used to the motions and perform them decently, but it still isn't perfect. One motion control I love, is the mellee. You simply push the remote forward and you swing your gun. It is pretty satisfying to shove your arm forward, and have the action mimicked on screen and take down an enemy. The main review says it messes up your aim, but you don't need to aim much during a melee attack.
Medal of Honor Vanguard does have split screen multi player. I have only played it one 1 vs 1 because I only have 2 controllers, but it is pretty decent. It gets boring after a while, and would have been great online, but other than that the only other replay value is beating the game in different modes, and collecting all the medals.
The graphics are pretty good. I can compare it to some PS2 games, but i know the Wii is capable of much more. It is nothing unbearable though, and i didn't have many problems.
It also has your average booms and bangs and battle cries, and it all sounds pretty good.
This game is definitely worth a rent, but maybe nothing more, as you can beat the game in a few days, unless you want to get all the medals and beat it in every difficulty level. It will be worth your time though, and if your like World War II shooters, you will like this game.