I put it down on disk 2 for some reason. I wasn't bored or anything, I just got busy and never went back to it. Same with Resident Evil 5.
This sorta thing happens way too often for me. Regardless of what game it is, its length, or my love for it... more often than not I'll get distracted by another game once I'm half to three-quarters of the way into it.
I'm on chapter eleven... don't know where that falls in terms of discs since I'm playing on PS3.