Most:
- The ball unscrews, orients and screwed back easily
- The foot is stable regardless of the orientation of the camera (a small notch for attaching the 90 °)
- Delivered with its cover
- At the very solid air
I expected just to secure the knee in one dimension and to move the camera in the other, tracking shots to shoot movies, but once the tight ball, it is in all axes! I would know for next time.