I think it is still too early to tell what the outcome of the 6.7L will be, There is a lot more little systems in that motor, Like 2 cooling systems. The 6.0 was great out of the gate but time and poor design ate that motor up. So far the 6.7 seems to be pretty solid. You have your pros and cons as new technology gets put into these motors, but it will be 4 years or so till ford really proves reliability for a good motor. The pros and cons are there for ALL new motors any manufacturer. (My opinion only)