Knock on wood. Solid 25,000 miles so far. 6MT 2013 335i M sport.
Just had the "faulty cooling fan" replaced a few days ago, due to intermittent loss of power. Also, my seat warmer sensor is going bad, so they will be ordering me a whole new seat! I guess they can't replace just the sensor. I'm not complaining. New driver bucket seat on the way!
Aside from that it's been very reliable so far.