If you are going to buy it for Single Player, I suggest you don't do it. That's just wast of time and MONEY.
Why?
You guys do realize that every FPS game coming out today is more focused on the multi-player than single-player. Like Black Ops will be any better. Stop whining and let the people play what they like.
Well there are alot of players who buy games for their single player campaigns, and in the end we get disappointed with short lenghts.
FPS is a universally beloved genre, many games - Including me are more into single player campaigns...But the gaming compaines fail to recognize this factor.
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Again, nobody has mentioned how long exactly is the single player campaign of this game - IN HOURS. Some people are satisfied with a length of 5-6 hours, and some people are extremely disappointed by it - So why not clarify?