So I am looking to place an order for the HotHead Headliner and I was wondering of the sound assassin strips are really worth the extra coin. I am by no means an expert in sound deadening or temperature reflection (is that even a thing?). It would make sense to me if the entire roof was covered with the material but I just can't understand what type of impact these strips would have. I was hoping to get input from those of you that have them. Thanks!