I would agree with Recon, it's almost too much 'realism' to have in a game to even have it be enjoyable anymore as it is a simulator.
It can be fun with people you know when you get into fire fights, but thats rare.
Although its a good mod and succeeds at what its trying to aim for, it's just too much to make it enjoyable to myself. Even RO is a bit on the annoying side sometimes, and thats not nearly as bad. At least it doesn't make me dizzy like playing Resistance and Liberation...