This game isn't just a shooter. You have to think, lead and act. Yet, no phase overwhelms the others, unlike other games of similar design. Though similar in some ways to Rainbow Six, it is easier to setup and start missions. The missions are interesting, realistic and vary from pretty easy to tough, really tough.
Controls are easy to get used to and the game is fast paced and addictive.
One tip, use tear gas, it definitely helps to give you an edge.