Hi there, I'm wondering if there's anyone out there who has used, or heard of anyone using this product:

VariZoom VZ-ZGRIG Zero Gravity Rig VZ-ZGRIG B&H Photo Video

I'm very much considering it for my shoulder steadycam option for a documentary i plan to shoot over the course of the next year. I can't find any review or first hand testing online anywhere! It will be for an canon xf300.

any help is greatly appreciated!