I bought it off steam when they had this special offer,
It's more realistic than other games, it could be a turn off because you cant really run and gun like counterstrike. No crosshairs, you have to manually reload, your team mates are not indicated until they are right next to you, difficult to aim, run out breath running, tanks are cumbersome. Even though it's a pretty old engine, it still looks pretty good due to the detail they've lavished into the maps.