Have the Road Comet. I'm barely 6' tall. With no screen I felt like I was being severely pushed back, felt all the pressure right on my stomach. Felt like I would be pushed right off the back of the seat. Struggled to stay put.
With the Road Comet, the wind is now at my collarbone area, but seems spread out, it's not pushing me backward, so it's not uncomfortable. Haven't noticed any noise. No pressure on my helmet or face shield. Tried crouching down- tucked- does not give me any more relief.
Much much more comfortable than no shield, but it's not a windshield. I think if I were to take a 250 mile or more trip, I'd look to put a real windshield on.