I must say...I am 6'6" and 250lbs and this is the first seat I have had that I can actually drive over 200 miles in without stopping to stretch. It must be impossible to make a seat to fit every ass.
The body shop tech at my dealer put 3M anti-squeak tape along the top edge of my tailgate. To my amazement, it worked. The noise I was experiencing was loud and maddening. This was a 10 minute job and worth the dealer trip...Good Luck!