The foot is adjustable in three pieces with a screw system around the foot and not to raise or lower as other foot have. It's more like adjusting a microphone stand.
This system is very convenient because despite the weight of the camera + lens coupled by not squeezing the little one can easily adjust the height.
While the ball only allows 180 ° rotation of the device (it is not a sphere), but it added some stability with a torque device + heavy lens.
I can not find fault him yet! And I highly recommend!