I did remove it. It was very simple. Just take out the rubber strip under the window and you will see the screws. There is one screw on each side at the bend of the window that is a machine thread with a locking nut on it so its kind of a pain but I just used some vise grips and a cordless. Then you will need a short right angle phillips under the tower at the back of the windows. Took me about 15 minutes total to get them out.

I shopped around and paid $175 but the highest bid I got was $299. So it pays to look around. I did the 30% and wish I had done 20%.