Stock style sound deadener

If you arent using any other form of sound deadener- definitely use it!!!
I can think of no cons... only pros. Be sure to put it out in the sun for just a little while before install... will conform to all bends and bumps. Very easy to install.

Call it overkill... but I used all and it cut down on heat/noise BIGTIME in my vert!

1st I used Peel and Seal (similar to Dynamat/Raamat- but cheaper) from Home Depot
Then put down the factory sound deadener you are talking about.
Lastly- had the mass backing/jute on back of carpet