No, just no one

The only positive is the grip: Rubber hold good in the hand.
But we can not use it, here are the reasons:
Locking (small wheel) does not tighten enough and it turns on itself: the weight of the camera it rocking.
If, however squeezing to death we reach the lock, it is the sliding elements that run them, and there is no way to lock more.
In short good grip but unusable. Very disappointed and would not recommend it, prefer a more expensive model but better (at least usable ...).