I added some "Stinger Expert Roadkill" to the rear section of my car today. I watched the video on Youtube prior to starting the job, and had no problem at all. I added 20 sq. feet of the product and as directed by the video. The install was easy and all of the trim came out easily and went back in even easier. I took my Z for a test drive and immediately noticed a marked reduction in the noise from the hatch area. The same company makes a carpet pad that you slide under the carpet. I may try that next to quiet the front just a little.