If only two windows are powered, I would rather it be the back ones. Some our Ford Focus (behind-the-wheel instructor) cars have rear crank window and power front. It's stupid! It may as well be all 4 crank windows.
By the way - 1988-1993 Ford Festiva didn't have crank or power rear windows. You could pop the rear windows open like the back of a manual sunroof turned sideways. I left them open throughout the summer, unless it was raining hard.