If you ask about gameplay, I can say it's very entertaining at clan wars. Public games can make you bored after longer playing. Also without stuff for real money game is unplayable.
In game you have standard modes: like TDM, Search&Destroy (plant or defuse), flag match, UBA - never ending deathmatch you gain exp/bp for kills when you quit the round by yourself, then exp/bp are given to you.
By the way game is easy if you have money for tactic packages or atleast good weapon + medkit. Then you are unkillable, even hacks doesnt needed.
I've played at Blackshot Europe where you can play too, at world servers. Where are more people than on european ones.