Just an update: Did this project, used Kilmat, a Dynamat knockoff on Amazon for $55 a box. That's almost a 1/3rd the cost of Dynamat. I started with just the front two doors to "try it out" and see if it was worth it. The interior plastic door skin/panel trim comes off easily. Started with skinning the inside of the outermost portion of the door, covering as much area as I could reach. *Warning*, sharp sheet metal and the foil of the mat = your hands will get raw. I started with gloves, but opted for more dexterity. I bought the roller that was recommended...save your money and just use the butt end of a screw driver and your fingertips. It's all you need. Then, I skinned the innermost portion of the door with the mat, covering as much area as I could. Average labor time is about 1.5 hours a door. After finishing the two front doors, I was amazed at the sound quality of the stereo (I installed the R-F upgrade a few months earlier). Also thoroughly impressed at the markedly diminished road noise. SOOOooo then I went nuts: did the rear doors, hatch, under the hood, and entire trunk under the spare tire, etc. All in all, I put about 6-7 hours in this job. Sounds crazy, but was well worth it. Needed to buy an additional box of Kilmat, so $110 for the whole car. With/without the stereo on, the sound dampening and the "solid" sound of the doors closing is that of a luxury car now. One if my major complaints when I bought this car was the fact that you could hear every pebble that you drove over, and the tin can sound of being in the car, let alone the high engine rev of the CVT to maximize the modest horsepower.
Take this for what it's worth, I was more than pleased with the outcome, but obviously it's a time commitment.