Before deciding, I have tried several ball heads. And I was guided me on the following criteria: - Terminal behavior at high load, - Net weight of the head (I have the very light and stable Sirui N1204) - An Arca-Swiss compatible quick release plate, - The Panaoramafunktion. With all the above points I was convinced of the K-20X. One point deduction I give for the friction adjustment, which only a soft and smooth Freise moving the head allows sufficient.