As said earlier, teamwork does happen. If you played project reality, then the teamwork will feel the same, ie. big groups running to objectives, and everyone staying together. The graphics and animations are also really good, especially the weapons and vehicles, compared to that "Battlegroup Frontlines" mod that came out a while ago. I'd say to anyone not sure about getting to do so.
I don't really want to enter the territory of "is it going to be better than Mare Nostrum", but I must say it does convey the atmosphere of the North African campaign very well, with dust, sounds and just general little details, such as birds flying out of trees when you shoot near them etc. Mare Nostrum (and RO in general) could get some good ideas from it.
To me, this mod combines cinematic type gameplay (as seen in COD) with realism and teamwork (like in RO), which is why I like it so much. Ro, even though pretty realistic, just doesn't contain enough atmosphere etc. to make me really immersed in it, where games like COD are just too arcadey. FH2 contains a mix, which imo is the perfect type of game.