Many have. however the best RV antenna per assorted lab tests is the Winegard Sensar IV. followed bumper to bumper by the Sendsare III with Wingman add on and the Sendsar II towed behind that (not much difference)
Adding the Sensar PRO indoors makes a big difference as well.
Though many praise the Jack. .. testing shows that at it's best it is half the antenna the Sensar IV is. and in most cases not even that.
HOWEVER in some conditions the Jack does very well.
I'd stick with Winegard.. When I accidently totaled my S-3 I put up an S-4 Even with the needed repair work it did not take 30 minutes Two bolts. one cable. Had to put a new end on the cable (Easy to do I have the tool needed to do it RIGHT)