I have a Bog Pod with the standard V cradle, and the Primos Trigger Sticks (Mono and tripod).
I far prefer the Trigger sticks for ease of use in the field.
While the Death Grip and such clamping devices would be steadier for aiming/shooting, they do not appear to be as field user friendly if you have to move and adjust to terrain, etc. if the target animal moves requiring the shooter to move and adjust the sticks to the new position's requirements.
If you are in a stand or blind, they would be fine, and the units that are more like the rests you can use on the bench at the range, would be a great choice.
All depends on where and how you hunt.