When my dad bought the 944 back in 83, it became our family car until 1987 when we got a Mercury. My parents rode up front, and my sister 13-17 years old, my brother 12-16 years old and myself 3-7 years old (at the time) rode in the back seat. I sat on the hump since I was the youngest/smallest.
Just tonight I squeezed my 3 of my friends in it and went for a ride. It's amazing how slow it is when it is weighted down.
Who ever said that our back seat is unusable?