I have a 2015 lariat f250, 4x4, 8ft bed, super crew. It is a beast. Purchased from an oil rig company, it was the supervisors truck. It was well used, but in immaculate shape (except the bed, which shows how much stuff was put in it). 195k miles on it now, almost 10500 engine hours!!!!!
Pulls everything without a problem. Rated for 3k+ lbs in the bed. I've put 3600lbs of sand in the bed. Handled it well, never hit the bump stops. It is our farm truck, not a daily. We pull a 4 horse slant with living quarters, round hay bales, etc. Have the 3.73 axle, so it gets about 12.5mpg unloaded. I never tow faster than 70mph, and it will consistently stay a out 10-11 mpg on the highway (fairly flat and level in eastern NC. With me and a full tank of fuel, it tips the scales right at 7800lbs.
My only a couple issues so far, one has been a bad wire harness to the backup camera (replaced the loom that was in the tailgate, $35 fix and 30 mins of time). Another was a failure of the interior adjustable side mirror switch to fold the towing mirrors closed. 1st world problem, but a $15 fix with a new switch from Amazon. It currently has a slight leak on the high timing chain cover on the left bank. Doesn't loose any measurable oil during the change interval (at least nothing on the dipstick), almost more like some idiot spilled some oil out the fill hole when doing an oil change.
I would buy one again in a heartbeat. I upgraded from an 06 Ram 2500 megacab..