No, I haven't experienced a blowout. But I like to think I drive with an awareness one facet of which includes that possible event. Having had a similar device on our old gas coach, and over 27 years read enough about them in various venues, I'd be more confident with one installed on the Beaver.
One piece of advice I've absorbed along the way is not to do the instinctive thing and brake in a blowout, especially a front one. Rather, one should keep the throttle there enough to maintain steerage and some modicum of control, gradually powering down and to a safe roadside stop. Suddenly hitting the brakes will take wheel power away that's necessary for steer-ability, offsetting drag from the depressurized tire.
Joel