I applied it all over my M5 and this product is the real deal. Last night I took the M5 to my local coffee shop. Unbeknownst to me, there was a forecast for heavy rain (which it never rains here). So my M5 got soaked last night. After the coffee shop I drove it home and then parked it in my garage still dripping wet. When I went to work this morning, there were virtually no water spots left on it. The only part that was dirty was on the rear part of the trunk where dirt had accumulated. The rest of the car was bone dry and no water spots.
I had also applied the Opti-Coat 2.0 to all of my windows, my wheels, inside my door jams and even on my interior Piano Black Trim. The product is the real deal!