I am a finance manager and sell this product; it is great. We have many different dealerships and use them on cars from Ferrari to Hyundai. The sealant for the paint is the real deal. The only question you need to ask yourself, "Do I like to wax my car for fun." Reason being is this is a sealant, you are not suppose to wax the car after. This product has a 10 year warranty and wax being an abrassive compound will take it off over time. As for the interior product, I dont care for it on leather. However, it is great on fabric to avoid sweat, moisture, and dirt. If anyone has questions please ask I have been applying and selling it for 7 years.....never had a claim on the warranty.