Sorry, but i'm not a big fan of the stuff. If you use the same time and energy sealing all the hot air sources, then use a dense jute like original, you'll lessen most of the sound and heat. You can also put down a layer of ( oh, what's the name?) that self adhesive plyable 1/8" thick stuff they use on roofs, under the shingles, at the roof edge, to really deaden the noise. It's just like the original.
My complaint is that it's difficult to glue down. Then, once it's in, the carpet is difficult to glue to it. If the carpet plugs let loose - and the new ones do - the rug slides all over the place.
It's basically foil lined bubble wrap. Heavy duty so it doesn't pop when you put weight on it.
Here's my biggest complaint----
When you hold it in your hand and you spray glue on it, as the glue dries, your hand underneath it gets cold. That means there's a heat transferthrough the material. No insulation. If you do the same thing with jute, you feel no cooling. No heat transfer.
On the E's, be sure to put the 2 asbestos shields back under the floor above the mufflers and downpipes. Also put the foam cover over the trans before screwing on the cover.
Then again, in New Mexico, the summer sun will get you from above.
Guess who has to take his light switch back off, so he can screw on the plastic light escutcheon!
Phil.