I have a phantom 2 vision plus and I've got around 25 to 30 flights on it. The quad is great and I love everything about it', but occasionally when I'm flying I will loose control. It's almost like my speed controllers aren't responding? The rotors are spinning enough to keep it from totally falling out of the sky But it will descend and bounce of the ground a little faster than you would normally land. Then I will regain control. I need to address this issue before I have a bad accident. Does anyone have any suggestion?