When Modern Warfare first came out, Infinity Ward said that a Wii version would be impossible to make! Well two years later Treyarch proved them wrong. DEAD wrong!
Graphical differences aside, you are getting the same experience that you would from the HD version, even the "Mile high club" level made the cut. If you love multiplayer, its got that too! If you love shooters on the Wii, you can't go wrong with this.