MGS4 -9 hours of cinematics, 21 hours gameplay=30 hour game. Good or bad?

[The Fury]

Donesn't bother me.

9 hours is a set figure, it could take me 15 hours or 40 horus to do the rest because I'll play at my pace.

It's the same as in RPGs, especially FF games, there are a lot of scene and before voices, even more where I'd jsut sit there pressing 'X' everytime I'd read a scene.