I'm not Rambo, so I was never in a war. But seriously, when the devs talk about realism on this game, they mean it. With that being said, this is an FPS I'm terrible at, but I will give you an honest review.
The Gameplay:
There's a variety of gameplay types, but I won't go into detail because the essence of the game is basically the same in all of them. For example:
-Cover matters on this game, and if you have played other FPS games that stressed the importance of cover, this game will probably stress the importance of cover even more. Forget running around aimlessly and looking for someone to kill. You definitely won't be going up the scoreboard using that approach.
-Staying hidden and scanning the area is very, very important even if you're not a sniper. If you don't know your surroundings, you're going to get killed by the person who does. Staying hidden and waiting for the right time to shoot is also an aspect of this game you need to apply. You'll have to station yourself in buildings, hide behind rocks, anything that hides you from plain sight. The people who get the most kills on this game are the ones who know how to think tactical. It's not about how good you are at COD. It's about how well you can apply tactics.
-You can die in much fewer hits than on most shooters. While it is possible for players to take quite a few bullets in the torso (depending on the armor, that is), for the most part you can die in as little as one shot from a pistol. Keep in mind if you're not used to this type of playing, chances are you may find this game unappealing.
Nevertheless, this mechanic allows the game to keep its tactical gameplay, forcing players to use cover rather than just running around like headless chickens on a rampage.
-Lastly, teamwork is very important.
The cons of this game:
-You can die very fast. While some people might not mind this, I honestly don't think it's that fun to get killed by your enemy without even having a chance to react. Yes, you saw me saying earlier that dying fast on this game is a good thing. It can also be a bad thing imo. I wouldn't mind if players were given a bit more HP but not too much. That's basically all I got to say. Is it a bad con? No, it's not really a bad one at all. More like a minor nuisance.
-Almost every server I try to join only plays on game mode called VIP. On VIP mode, one team has a special person, hence the name VIP, that they must escort to a checkpoint. The other team must defend their two checkpoints and kill the VIP before they can escape. It's not a bad game, but it gets really boring if it's the only game mode people are interested in.
Conclusion:
It's realistic and very fun to play, and while it does have only two annoying cons, I'd say this is a great game that you should consider buying if you're sick and tired of all the other FPS games out there that are all about running around like a complete moron and mindlessly firing bullets to get as many kills as possible.
In short, using your brains will make you better at this game than your itching trigger finger.