Did the Dynamat make a difference in "Road Noise? Also, was it difficult to remove the trim to install it?

Dynamat made a slight difference and removing the trim to install was extremely easy. Road noise has a lot to do with the type of road you are driving in. On bad road, I still hear some just not as loud as it used to be. On better roads, the noise has been pretty much cancelled out. I would recommend doing the trunk and doors; if not satisfied you could also do the floor and wheel wells, as far as I am concerned I am pleased with what I have right now.