My Hiace is fitted with the Dynamat in the front. My mate did it when he fitted the V6 and it seems to do a pretty good job of keeping road and engine noise out of the cabin. The rear just has a rubber mat on the floor but on the whole it's not bad noise wise for a 20 year old Hiace. I'm guessing it's probably a bit easier to remove than a spray-on should the need ever arise.