I'm in the second year of a lease on a 2013 XLT. I have the V6. Mileage is not quite as good as advertised, but no complaints on that count.
I'm very disappointed in the SYNC system, however; especially attempting to use a non-ZUNE MP3 player (Sony Walkman). Even now, when I reverted back to a ZUNE player, the radio will change between MP3 and AM/FM radio without me doing anything; and it constantly re-indexes, even when the MP3 player hasn't been disconnected. I've discussed this with Ford, and their in-vehicle tech support. But, there's apparently little that can be done. It has the latest version control updates, so out-of-date software is not an issue. The SYNC system is designed around the ZUNE, but good luck with finding one, since they're no longer made.
The SYNC System has gotten some deserved bad marks. The telephone SYNC portion works fine.
The only problem I've had outside the SYNC, was the failure of the power door lock module. It failed after 6k miles, but was replaced. That has been the only problem with the vehicle.
I worked for Ford for over 38 years, and I was an IT manager when I retired. It's beyond me, that a computer system installed in a vehicle with such a narrowly designed music platform. The world lives on the iPod. I guess that the Microsoft design is just not a sturdy enough platform.
Best, Dennis