I finished at 91 hours, and while I enjoyed my time with it, I don't think I could have lasted much longer. I already had to take a few breaks by that point cos sometimes I just got sick of it.
I think that's as much a reflection on me as the game though; I find it hard to stay interested in one game for an extended length of time. I tend to play through something, not touch it for a year or so, then come back to it.