I am considering installing additional sound proofing for my Prius. Has anyone done this before? I love Prius, but I feel that road noise could be a lot better. When I was on the market for a new car few months ago, I seriously considered 2012 Camry that I test drove, and the interior noise, especially on the highway was way better than in Prius. I ended up going with 2011 prius anyway due to technology and fuel economy, but 2012 Camry was definitely very quiet... I even considered Camry Hybrid, but fuel economy was not as good, also Prius has more cargo space... Anyway, do you have any tips on soundproofing a prius? I've done Toyota echo before and had many great results with Dynamat and Dynapad placed in the door panels and under the carpet. Thanks!