It's definitely not fast paced. A friend of mine was a WWII nut for a disturbingly long time and I kinda got the idea: it's supposed to be hard ; )
Flying the planes is not easy, for example. And in the beginning, you only get crap planes that get shot down instantly... which you have to patiently use to get enough points to graduate to something better.
But it's intense, in a 'suspense' kind of way, I guess.
J