I just put the screen on today. I haven't driven a lot but here is my opnion. Before the screen, around 50 to 55 was a lot of pulling and pushing (wind that is) when I had my backpack on. Now I hardley notice. Now, it is much smoother and it seems the faster I go the less turbalance I feel. I didn't think I was going to like the little turn up at the top of the screen but I think it is what really makes the difference.
P.S. I just added several of the links I have accumulated over the last month. I have several more but found them in Europe.