I have flown both. 90% of the time I am twisting the throttle. Vernier is the best way to go. Only time I am pushing and pulling the throttle is takeoff and landing. Vernier is much more accurate at adjusting rpms and manifold pressure. John, on a NA engine its not as big of deal because throttle is not as sensitive. With a turbo, I wouldn't run anything different, especially with a fixed pitch prop. You would be all over the place. The mcfarlane is nice because you can push and pull the throttle quickly, without pushing a button, and then you can twist it to give it an accurate adjustments. Turbulence they are nice. Updraft I give it twist out, down draft 2 twist in. Once its smooth a twist back and its right at 5200rpms I also like them for starting up. Pull throttle out then two twist in and she starts up 2000rpm every-time.