We had a major storm several days after they installed our new Canopy.  I watched out my window as it performed exactly as promised; the vent flaps puffed open as air was relieved, and the canopy never moved.

Several weeks later, we had a storm and flood, and our mooring lines broke and we feared our boat had blown away.  When we came to the pier, the boat was safely nestled inside the Mono-Port, dry and damage free.