Ford Flex is my company vehicle so it sees tremendous use. I really like it and so does my family for home use. Big and very flexible. One main issue so far is the Fuel Filler. The cap-less design is easily damaged and then you can't get fuel in your vehicle, it keeps shutting the pump off. I live in NJ where you can't pump your own gas so I cant control how they do it. Taking to dealer tomorrow to get it fixed but did some research and saw lots of comments on the web on this (not covered under warranty, etc. and it seems to be way too common). So be wary!
Sync system for hands free. Big flexible seating. Comfortable. Fairly problem free.
Cap-less fuel filler while cool seems to be easily damaged. FORD needs better design if people are complaining and breaking on a "New" vehicle. That to me means a lack of robustness in the design. Fueling should be a no-brainer