Have not tried it but can tell you that putting a new piece of gear on for a special hunt is a recipe for disaster...sort of like buying new hiking boots before your first ascent on Mt. Hood. If you buy it, go hunting with it a couple of times first.
I've got one that I use to put my phone on a spotting scope in the blind. It works really well, but I can't imagine using it in a situation where it's going to get bumped around. You have to do some fiddling with it to get it lined up just right, takes a minute or two each time you take the phone off.