I deadened all 5 doors the floor and back hatch area with Dynamat Xtreme. Made a difference for sure. I love closing the doors no as they make a solid clunk sound. I have enough left over to do the roof which still vibrates but the thought of pulling the headliner makes me nauseous. If I was going to do it again I would double up the layers on the front floor by the firewall. It took me an entire day with a friend to deaden the floor and another half day to do the doors. If your looking to save gas however note that its about 25 pounds a box and I used 2 and half boxes. Still get 26mpg : ) Cheers.
Just out of curiousity, what size of the boxes did you get? I'm just checking to see how much I'll actually need to purchase. I used about 4ft^2 on my rear hatch and it's half way done. I think front door I used around 8ft^2. All single layer Damplifier Pro. I <3 that stuff.
I agree with you on the *clunk* when closing the doors.
