 As stated in the title, the IRS is the only feature that beats the competition.  The Expedition lags far behind on both exterior and interior design, the latter is horrendous.  It's a sea of plastic and cheap materials.  Personally I ended up buying a Yukon Denali with the 6.2L motor.  Again, other than the IRS, the Denali was light years better than the Expedition in every way.  I also drove a rental Expedition that was 1 year old and already falling apart and looking very shabby.