I just picked up my focus yesterday. So far MFT is hit or miss.
About 10 minutes after driving away, the system wasn't responding to the voice button. It later restarted and updated and resumed functioning.
Today I found that if I left my phone plugged in after shutting of the car and restarting, it would play my music with no audio. I had to unplug and replug in my iphone to get is working again. I have noticed that typing into the screen for navigation is a little flaky. I couldn't get it to find some stores inside the mall.
I don't like that the navigation shuts off as soon as you "arrive" to the destination. I'd prefer to exit myself. I'll continue to investigate and see what happens and if performance improves.