coh is worth playing, but if you seek real ww2 atmosphere then play men of war, despite it's poor graphics.
any way... the game is more entertaining when playing with your friends via lan or internet. the game is really fast that you don't seek for reality while playing in multiplayer mod.
game difficulty is just right, you can play it easy, normal or hard levels. if you ever played commandos, this game is piece of cake for you.
artificial intelligence in game may be sometimes bad, but i can say that there is no a big problem with that. i mean, you can easily play in skirmish mod with ai just like you play with your friends.
in my opinion, if coh was more realistic and shooting range was more distant from enemies this game could be a legend.
as a conclusion, if you seek real ww2 atmosphere and interactive environment, then men of war is a better choice.