Stopped playing SoM at 40% or so, according to the ingame stats. It started off well, but in the end it felt too much like groundhog day.
However, the story wasn't that bad, the game mechanics worked well and the graphics were decent too.
The Nemesis system was a bit of a joke though. I often killed tier 2 or 3 bosses only to see them being replaced by completely new ones (none from the tier below e.g.). A decent mechanic, but some tuning here and there was missing I thought.