I've had both the Sensor IV (current Batwing) and jack on the same 5er camped in the same general areas. I give a heads up to the Sensor IV, but not by much. The antenna on my rig was an old batwing and doing the research I decided to upgrade to the Jack and removed the entire old one in place of a Jack. It was an improvement from the old one but since it is mounted in the bedroom area and stivks up a good 8" or so, I didn't really like the looks of it. That changed when I missed a branch going into a State Park in which I found out how easily the Jack snaps off. That's when I changed to the Sensor IV.