I doubt that being a 3m cert installer is going to keep things from failing stuff happens to graphics. A good installer is a good installer weather hes 3m cert or not all it does for you is put you and your companies names on list that will draw you business. There are 3 levels of 3m cert one as 3m pref installer one as an actual 3m cert installer and one as a 3m cert company wich requires you to have a cert installer working at your company. All take a lot of time and money and sure there is some pay off but who knows.