Not sure about anyone else, but I upgraded to a Jack. I pull in stations from far away with the Jack better than the Winegard ever could! Even when new the Winegard could only pull in about 12 stations. After I went to the Jack I could pull in 72 stations. I'm about 45miles from Chicago so it is a pretty good test. My buddy had he Winegard and added the Wingman and it never did any good. He upgraded to the Jack a year after I did and was very happy he did.
Yes the Jack has to be aimed precisely, but that's why it's a better antenna! Once aimed it is stronger. One campground we go to neither of us could get a signal when I went to the Jack I got 20 stations, I could turn it towards another city and get thier stations too, obviously not at the same time.
Real world tests are much better than what lab tests show!