We've had our 2009 Flex 2WD with the naturally aspirated 3.5L V6 since brand new, it is coming up on 11 years old on June 9th.
The first 10 years were extremely reliable, the last 12 months the suspension system has been falling apart 1 piece at a time. Wear and tear per normal, not a slight against Ford on this aspect.
I have done the water pump and timing chains as a pro-active measure 1 year ago, there were no coolant leaks but I felt it was too anxiety provoking to leave it alone with this engine's tendency to leak coolant into the engine oil and spell disaster. The Flex has benefited from my OCD maintenance regimen, so if mine is better than average then the credit goes to me.
So now it has 227,000 km and is still driven 20k km per year. The rust on the driver and passenger door mirror internals has been held at bay, but one good hit and the mirror will fall off.
Would I purchase another one if Ford still made them? yes.