I got this ball head as a christmas present and am absolutely delighted with it. Manfrotto makes quality products at a decent price. I previously used a tripod that had an annoying video head on it which meant that any tilting off to the side was impossible with the head. This ball head is a godsend, you loosen the one bolt, move the camera where you want it then tighten the bolt again. Job done, quick and simple.
There are two notches cut out so you can tilt your camera over to portrait format. When you loosen the bolt the whole head can rotate so you can position those notches where you need them before tightening everything up.
The quick release plate is small and can be left permanently on your camera. When it is clipped to the head it connects smoothly and stays put. There is a secondary safety catch that engages as well so there is no chance of mistakenly unclipping the camera.
A real high quality head that offers lightning fast adjustment.