McFaddens Roofing of Orlando just purchased 33 large units for an apt they are doing. It saves the effort of removing shingles and replacing flashing only to have it torn up again. Critter Quitters will stop the damaged flashings from leaking and protect them for decades, while at the same time keeping frogs and rats out of the plumbing. They also look good. If you got an apt or condo building, consider them.