Got our upgrade in the mail a few days ago. It was attractively packaged and the instructions clear. I initiated the upgrade, but it errored-out with a message about possible corrupted files. I chatted on-line with someone from Ford's MyFordTouch help desk, who advised me to do a reset first. After doing so, I was able to then proceed with the performance upgrade.
My first impressions are VERY FAVORABLE!.
Ford seems to have gotten it right this time. While we were generally pleased with the stability of the system recently (after several updates to the system), it is now much more responsive and the screens look much better. Many of my annoyances have been resolved. In particular: It is nice that the volume controls now permit fine increments, and Indexing of my SD music card is now very swift.