It's clunky and slow for the sake of saying it's a realistic mil-sim. It requires genuine situational awareness and a level of squad/fire team tactics. This game's physics takes time to get used to and in total is an acquired taste on the merit it isn't very user friendly. This is partly due to the menu navigation and overall controls, they're sort of clumsy.
I don't recommend this game unless you have a group of people and patience as well.
