I bought this head to go with the Manfrotto 055XPROB tripod and it's really flippin' good.
It's just so easy to use! Once you've got the camera secured onto the head and tripod assembly all you do is squeeze the handle to release the grip on the ball joint housed within the unit and you can move the camera into almost any position imaginable! You can point it up about 5 degrees or down 90 degrees and also rotate the camera into portrait orientation on the left or right side in seconds.
The really cool and timesaving part though is the detachable plate mechanism. What you have is a little plate that screws into the base of the camera using the normal tripod screw. To detach the camera from the head all you do is flick a little locking lever underneath and pull back the main locking lever on top and the camera is free to handhold with the plate unobtrusively still attached to the base of the camera. It takes about 1 second and means you don't have to unscrew anything. To reattach the camera simply get the bevelled edge of the plate back in its recess then let the other side click down, push the main locking lever in a bit to ensure a firm grip and flick the underneath locking lever and voila its back on in about 2 seconds, rock solid and ready to point anywhere.
The head also has a dial to adjust the tension required to overcome the grip of the ball and socket joint. It is rated to handle a camera combo up to 5kg which will cover most gear combinations save for those huge white canon 'L' super zooms weighing as much as a small child.
And finally this thing is BUILT - it will last for years. And it has a cute little spirit level built in!
I want to knock a star off for the price but can't bring myself too. It's just so easy to use.
Fabulous piece of gear.