The material is very easy to install. It is forgiving if you don't press too hard as you are adjusting its' position. It bends easily and therefore it is no problem to apply to curved areas. I put this in all of the doors, reaching into the void of the door so as to be just behind the outside of the panel. It made a huge difference in the sound produced by my door mounted Infinity coaxial speakers...less tinny sound, punchier mids and lows. When I tap on the outside panel of the doors they went from "ting, ting, ting" to "thud, thud, thud. Closing the doors now has a nice solid feel. I also removed all of the seats and carpet and covered the entire floor. Next will be over the headliner. So my 2000 Jeep Cherokee is now really quite quiet inside. It seems to have good insulating properties as well. As an added bonus the quality of Bluetooth phone conversations through the head unit's microphone is very much improved. I would recommend this product to anyone looking for a high quality, sound/vibration deadening material that is easy to install. Definitely buy and use the roller made by the same company to get the best reults that are sure to last.