I played the Bourne demo and was underwhelmed by the quicktime boss battles and the horrid driving level. I'm still eyeballing picking up Stranglehold. I'll be giving the QoS demo a look.
I was also underwhelmed by the Bourne demo, but I felt the final game was far more playable and of much higher quality. While the driving level felt a bit tacked-on, the rest of the game played very well and the combat was brutal
. At first I thought the quicktime button presses were difficult to handle, but over time they just seemed to work with what the game was trying to do, which was provide a feeling of having that "sixth sense" like Jason Bourne. I enjoyed it enough to play through from start to finish never once loading up another game until it was completed.