I've had my F150 with the 2.7 ecoboost and it is amazing. I test drive the 3.5 ecoboost with the 10 speed and it was even better. I've driven the 5.0 v8 and thought it was a dog compared to the ecoboost. I traded in my old Chevy Trailblazer and that had a 5.3 which was fine above 3,000 rpm but the transmission didn't like to downshift enough.
The Chevy was a POS compared to my 2007 Honda Odyssey. Both vehicles got the same maintenance care and had almost the same amount of total miles. Yet the Chevy had 4 times the $$$ in repairs vs the Honda. I have zero brand loyalty so I hope I have better luck with this new ford than my recent Chevy.
Good luck with the new F150. Make sure to switch to sport mode once in a while -it will make you grin...