1. The quick release plate has no slot but only a round hole for Besfestigungsschraube. Thus they can not be optimal and consistent position of the camera. In the Nikon D300 for example, has about a quarter of no contact with the camera. Thus, the frictional connection to the camera is poor and the camera turned particularly for upright shots to the plate. In addition, the attachment of the quick release plate on the ball head no standardized (Arca Swiss) connection, which the accessory options and compatibility with other systems significantly limits. Incidentally, I have the problem with the poor holding in portrait orientation with a Sirui TY-D700 Schnellwechselplatte definitely solved. Which is made specifically for the Nikon D300 / 700 and fits positively and absolutely fixed to the housing.
2. Much more serious is the following problem: both the friction and the locking screw on the ball head has a thread with a very high pitch (probably not a metric but imperial thread). Therefore, the head can easily solve completely with just a quarter turn. This means that if you come by accident and only slightly on the lock lever and releases him, the camera is immediately loose and slams down. The only remedy is a sufficiently determined friction screw. But that makes no real fun, because the camera can then move difficult.
I work a lot with tripod and I thought, I get used to it after a few months. Unfortunately, that was not the case and I found working with the ball head finally so annoying that I have sold him ... after 6 months at 1,2,3 again.
