We have a 1251 sb that we put on a 2001 F350 extended cab short box .... no problems with the camper really , a bit more particle board than I would prefer and I had to reinforce some parts of the dinette seats that you stand on to get into the bed area ( a little too flexy for my 250 lb frame )...... the top raising mechanism works great ( vastly superior to the design on our old camper a Skamper 100s) , and the wiring had a few loose-ish scotchlocks that I had to hunt down , ours has the indoor shower/toilet area ( happy Wife, Happy camping ) I added a couple of bag awnings , and the full height door on the split folding back wall is worth the price alone ( I don't know how many times I beaned myself on that Skamper door frame , apparently it did not knock any sense into me )