I installed this product in the front door panels of a 98 Jeep Cherokee. The area that I installed it had lots of contours, but I didn't have any trouble getting the material to stick. I installed it during the winter time, so it was pretty cold and the material was stiff. I took a small electric heater and used it on both the door and the mat for about 10 minutes and it was plenty soft and stuck securely.

The material did help deaden the area around the speaker and provided a cleaner sound. I think the major downside was it's size. It only covered about 1/4 to 1/3 of the door. To really deaden the whole door from the speaker and road noise, a much larger mat is needed.

Pros:
Easy to work with
Great adhesion
Cleaned up the sound

Cons:
Not large enough to fully cover a door

Recommended for cheap price and works just as well as the high priced products.

Nice little kit, great for some small door or panel speakers.

It's not name brand but it worked. was only for speakers on my dash but its fine.