10/10 for sure. In my opinion this was the best out of the GTAIII Engine series... although it lacked some of the features of SA and VC terriably. But when it comes down to it, the setting... the story... and the gameplay was just awesome.
P.S: The guy you play (The guy who doesnt speak) is my favourite all time GTA character if only he was the main dude in IV that would kick so much ass.