The Jack provides great reception. My rig came with a Jack installed from the factory.
The downside is the Jack is more vulnerable to limb damaged vs. a typical crank up. My Jack has been knocked off by limbs twice.
Another downfall of the Jack is that it can rotate too far a snap the flimsy internal coax. When this coax breaks you have to remove the entire unit and reinstall.
I like the reception the jack provides, however in hindsight I believe there are better more durable options.