It has been in at least 5 times for the shudder and slipping. 20K miles. 2 times so far clutch packs have been replaced and the other times it was reprogrammed with Ford's constant updates to fix their known issue.
When it works it is a nice car to drive. When it is shuddering and slipping, it is quite annoying. Mine is worst in heat and starting from a stop and turning a corner.
When talking to the dealer about it, they say to just keep bringing it in to get repaired while the warranty lasts. The courtesy driver says it is a big problem as he is driving people regularly.