The AGC binocular harness is very popular with bowhunters. The harness is great because it is comfortable to wear, can hold much more than just binoculars, offers great protection for your optics, and is built to last.
Unlike some bag harnesses, this harness does not restrict arm movement. Therefore, you can easily shoot while wearing the harness.
The side pockets are great for holding things you prefer to have ready-to-go instead of in your pack, such as wind checkers and calls. The front pocket can easily fit a rangefinder, and this version of the AGC harness comes with a compartment in the bottom that is great for a survival kit or anything else you want easy access to.
In my opinion, the only con of this harness is maneuverability. If you plan on moving from place to place often during your trip, it can be a nuisance to wear a bag on your chest the whole time. On the flipside, it can be advantageous to have a bag because it protects your optics from the elements while you move around.