COD MO makes it's debut on the Wii and doesn't seem to provide a less enjoyable experience than the PS3 or 360 versions.

User Rating: 9.5 | Call of Duty: Modern Warfare - Reflex Edition WII
With an exhilarating and action packed campaign, though being short really is the core definition of this modern first person shooter. The multi-player(online) is no more than phenomenal. With so many different playing modes to choose from, the online portion of this game can keep you playing for more 4 hours straight. Although being very similar to the Call of Duty World at War online mode, it is still a lot of fun and you cannot be disappointed. One thing that may be a let down in Call of Duty Modern Warfare Reflex and Call of Duty World at War is the 2 player co-op. The Wii being a family system, should have a fully capable 2-4 player mode. There are less weapons in the Multi-player compared to World at War and none of the weapons have bipods(attachments to mount on walls) like World at War either, although there are many new things to do in the Modern Warfare multi-player such as modes letting you gain XP points for example challenges and operations, etc. The campaign allows you to play with someone at home in co-op mode, but the mode seems to be restricted to limited capabilities such as split-screen which you won't find here. For people who own 2 Wii Zappers or 2 Nunchuks and 2 Wii Remotes(whatever you prefer) will be slightly disappointed with the limited co-op feature.

Graphics: 9/10: Although the Wii only supports 480p, the game still proves to look spectacular.
Audio: Absolutely amazing despite some annoying characters(for example Nikolai)
Story: Very interesting, this type of a story you can only find in movies.
Gameplay: Brilliant, it cannot be any better. The way the game is presented, absolutely perfect.

Overall, Call of Duty Modern Warfare Reflex Edition is a must own for Call of Duty fans or first person shooters and I'll be looking forward to see Call of Duty Modern Warfare 2 on the Wii soon! :)