The best thing about this game is that it's realistic. But that is also it's biggest flaw.
You find yourself dead after only one or two shots. You carry around limited supplies and ammunition. Your squad is small and they die. This is how most combat situations are in life and it can be fun at times but is this necessarily what you want in a game.
I'm one for these kind of games (or any FPS) but this takes it too far. You go in all guns blazing, you're dead in seconds. You go in slow and strategic, you will die just slower and without realising it. You find yourself on one of the easiest missions in the world, on the easiest setting and within moments you're stuck. I gave it chance, I changed my tactics. I've done everything apart from use a guide.
All I can really say about this game is it is very flawed and it has to take a VERY special kind of person to play, complete and enjoy it.
I'm not saying don't purchase this, I'm saying good luck to all those that do!