Regarding drive unit, take a look at the consumer reports data that RobStark posted over here: US Market Situation and Outlook - Page 4
For the drive system, the results have been steadily improving from 'good' (2012) over 'very good' to 'excellent' (2014), so it looks like they are taking care of the problems that were reported. Also, this has better statistics as obviously it is not only composed of people with drive train problems as the poll cited above. Also interesting is the improvement in the "electrical system" which I think might be related to 12V battery problems.
For the drive system, the results have been steadily improving from 'good' (2012) over 'very good' to 'excellent' (2014), so it looks like they are taking care of the problems that were reported. Also, this has better statistics as obviously it is not only composed of people with drive train problems as the poll cited above. Also interesting is the improvement in the "electrical system" which I think might be related to 12V battery problems.