I have a 2012 SFE that I purchased in Nov 2011 with 7 miles on it. Before I ever drove it, the salesperson told me about the shutter and explained why it was doing it and that it was normal. Within a month of getting it, I had to take it in to have the transmission "reprogrammed". That stopped the issues for a while but within another month I was back again. The service tech told me the same story and that I should keep driving it and it will eventually get better. I drive 120 per day all highway miles.
At 84K miles I had to replace the transmission.
Exterior and most interior features.
Do not sell this car like it is any longer.
All the money I saved on fuel, I lost when the transmission broke before it was even paid off. 2 years old and the transmission died.