I haven't played the demo either, for the same reason. I was talking to a buddy of mine last night who's also picking it up next week, and he said if I ever have any doubt between now & Tues. about getting it day-1 to play the demo.
I told him he didn't have to worry about that.
I need to pick LoS back up. I traded mine in (just the disk, still have the CE case & extras) last year when they announced the bundle. Then I found out that Mirror of Fate isn't on the disk, it's just a pack-in code.
So I'm torn between just picking up the original game or going ahead & grabbing the bundle.