Agreed^^... Trunk / Bumper / Exhaust rattle is lame. As for the dynamat job. It seem about average. There are many economical ways besides using dynamat brand dampening material. Personally, I think it was a waste of time with the HD insulation. I always 'mat my car when I plan to do a system. Head to toe. Take out all the seats, including back, and the carpet and mate the inside of the truck, inside cabin, trunk lid, and sometimes the headliner on SUV's. hehe, a friend of mine used rolls of lead to dampen things. hehe, crazy quiet.