I put prop guards on my bird before i first flew it, today, which was just too windy, i thought I fly my bird, had nothing to do, my fault, was just too windy, the gusts was the worst. I was flying out 2500 ft, and it would only gain 2.5 mph at full throttle at times so I decided bring it home, pushed return to home, it came back and proceeded to land, but the wind was woo tough, i had to help it down, at about 70' on decent, a gust came and I was full throttle climb and in full reverse, but the gust was too strong, and it nipped a tree, crashed to the ground, only broke 2 prop guards and 1 prop. Thanks to the guards, I put on new set props, powered it up and all was good! I recommend them on any quad copter!