Great overall construction, not very solid with the monitor mount.
The overall build quality and durability of the ball heads is impressive. The only problem is the 1/4" screw mount because although it fixes my monitor well it doesn't sit tight in the spot keeping my monitor loose and spinning all the time.
Pros
A secure closure with anti-drop technology on both ends prevents the ball from falling. And has a large wing nut for locking the double ball head.