Headliner install?

I put one in my car.

It looks like the owner installed it,
instead of a Professional. :(

To do it over, I would pay for it to be done.

Oh; the rear window should be removed, as the headliner goes under the
rear rubber gasket of the windshield.

The rear seat needs to come out,
the rear arm rests need to come off, to allow the upper part of the rear seat
to be removed.

I suggest replacing the rear seat divider, and package tray cover,
if they need it at the same time.

I added sound deadner when I did mine, to the floor, and rear package tray.