(2dr specific concerns, not exactly sure about 4dr back seats)
I've never looked too much at the seat bottom hinge points, but I tend to think the installer would have to pay close attention to the wiring harness in that area to make a long lasting, troublefree installation, considering how the seats have to shift and swing forward to lay down the seat backs.
I am having the Katzkin AC vented and heated seats installed in front this week. You might want to contact them and see if they have a heated package for the rear.