Best 3rd row seat is in a full-size SUV like a Denali.
I chose the 3rd row seat in the X because it is an option (I have every option) and because it could be used when it is needed. I have fit 2 adults in the back when going to the mall. The skinny ones end up in the back, and they seem to fit fine.
As far as the family goes, we take the Denali or 2 cars rather than using the 3rd row.