What a getter cover?
I have more than my fare share of over hanging Live Oaks, Chinese Pitache tree etc that make me pull my hair out annually. With 21 acres and about nine miles of gutters on my motel to clean weekly, I can think of a zillion things more fun to do. I have tried and spent more money on getter guards than I care to disclose. With that being said, I suggest that you keep the money in your pocket and continue to clean your getters the old fashion way.
Whenever you get a getter clog, and you will, you'll be cussing up a storm trying to unclog your getter with all that extra mumbo jumbo in the way. It literally takes less effort cleaning your getter's the old fashion way and produces a better outcome.