I don't have GameCube and not planing to acquire one in the future. As of now my PC is to weak for the GC emulation, so playing it is completely out of question.
From what I seen of this game (mostly cutscenes) it's really much better in presentation and voice acting than original MGS (of course die hard fans of the series will disagree with that), save for a few Matrix-like moments. Death of the Gray Fox and practically every major episode with Liquid Snake especially impressed me.
I played original MGS on PC, but it lacked proper articulate models with faces. Usually I'm not the one to complain about graphics, but since MGS is basically like a movie, I'd prefer to see it characters to be rendered as close to the human actors as possible. And it's really hard to take anything seriously, when characters doesn't have faces and have articulation of the wooden manequines.