That campaign was great. Odd thing is, I found mission 2 the hardest of them all.
I had that good old feeling of an OFP Campaign again. Decent storytelling, some character development and on top of that (and cretainly most important) : good mission design.
What I liked was the feeling of being a soldier in a real operation.
Often, other missions/campaigns depend too much on the player alone, making him an Uber-Soldier of some sort.
Not this campaign! I found the fact, that you can lag back a bit and watch the other friendly platoons take on the fight quite good. It also gives you another way of completing a mission.
For example, I completed mission 4 with only 2 kills on my account. Still, the mission was a success and the campaign went on. That's just great!
The only negative points were mentioned before: To low volume on voices in cutscenes, music a bit too load (but the actual music is really great!.