>>4206619>>4207000>>4206998Got this thing today. It's surprisingly solid.
It's all metal (except for rubber pads between the clamps) and the fasteners and the release are simple and easy to open and close.
I tried it with my 70-200mm too, and it holds well. I'm more scared the belt may give in. I don't think I'll be using it with that lens though (this is a 24-120mm, which is comfortable).