This thing is perfect for the A7III. The bottom screw to secure can slow things down a bit, but just bring the right tool and it's no problem. Great design, fun to work with.
Pros
Camera Top Handle: A top handle is attached to the cage for easy handheld photography. An integrated cold shoe and 1/4" and 3/8" screw holes allow for the attachment of microphones, EVF mounts and more.