I've found them more fragile when "trimming" tree branches and in bird strikes. They tend to shatter rather than bend, leading to more prop damage, and a greater likelihood of not being able to recover and still fly back home on lightly damaged...
I've been using the Master Air Screw props on my M2P for about two years now. I haven't seen any real benefit in terms of noise or extended flying time, but they have worked fine for me.
Along with stopping a mail thief in our neighborhood once, I used my Mavic to bring peace to our neighborhood last night. Our local PD announced that they would be out in full force last night (July 4th), including flying drones to make arrests...