We have a 2013 Cougar X-Lite RES29. The only complaint we have is the head room for the bed is limited. My wife and I are shorter and it really doesn't bother us too much as the only time I go up there is to crawl into bed but for taller folks it may be a problem. We have replaced our factory mattress for a softer one and a memory foam topper on it, the pin box with a Reese 5th Airborne Sidewinder pin box for a smoother ride both in the truck and for the trailer, 16" wheels with "E" rated tires and an electrical surge suppressor. Other than the above, we love out Cougar X-Lite but you do have to understand it is just a "weekend warrior" type model and not a "full timer" type model. You will not have any problems with your F250 as we pull ours with our Tow Max half ton.
'11 F150 XLT Red Candy Met. Ecoboost 4X4 Screw 5.5', Max Tow,Reese R16k 5th wheel hitch,Ride-Rite Air Springs, E Rated Tires, Extang Cover
'13 Keystone Cougar X-Lite 29RES,triple slides,Mor/Ryde suspension, Reese 5th Airborne Sidewinder, 16" E rated tires