Just got one.  6'  wind hits me about 6" below the chin.  Great at anything below 65, the workout begins at 70.  

I'm 5'8" - 5'9", 5'10"+ in my boots.

My first purchase for my Savage was a National Cycle Flyscreen.

Wondered how Thumper and I would do on longer trips, so one Friday I get off work, go home, take a nap, get up, eat, hop on the Bike about 9 pm.  Ride the 130+ miles to Joshua Tree, CA, hang around for a while in case anyone wanted to join me.  Midnight, head south 60 miles across Joshua Tree National Park under the light of the Full Moon, back on I-10 west to find gas and a Denny's for an early breakfast, back on I-10 and on home to complete a 350 mile ride through the night.

Most of the ride the Flyscreen kept the wind pressure off the body so I could comfortably cruise at 65-75 mph on the Interstate.  Most....   I-10, out between Beaumount and Indio, gets this WIND, a regular thing every morning, 30 mph or so blowing east.  With me riding west.  90-100 mph wind calls for a bit more than the Flyscreen.  Sitting up, anything over 50 was rough -- so I hunkered down behind the Flyscreen playing Cafe Racer.  The stock Buckhorns are not Cafe style clip-ons and the hunkered down position, while comfortable with the wind, was killing my shoulders as the bars were entirely wrong.  When I got pass the wind I ran into pea-soup fog.  Didn't get home 'til 7 am.  But I learned two things -- I need a bigger screen to go touring, and I don't get tired riding!  That last surprised me.

Did the same trip later, with a National Cycle Street Shield, and it did suffice.

With the Flyscreen the wind pressure is lessened so that high speed riding is not a matter of the wind trying to push you off the saddle.  Wind hits about shouder high.

With the Street Shield I can ride without additional eye protection, the wind hitting just about at the hairline.  ('Cept that one time in NM where the crosswind was so stiff that my pocket of still air was over a foot to the side.)

Thanks for all the review, guys.  I appreciate it!  It looks like the Flyshield is going on my "Please?" list.

  The bigger the better,I don't like head buffing,much more relaxed riding

 On that one you would have to ask a gold wing rider why he rides a motorcycle

Nothing was taken personal, 'twas just that you made it sound like the smaller shields were absolutley useless, and they're not.

This wind blocking thing is very much a personal preference -- anything from nothing to a full fairing with lowers.  The 535 Virago is not a 650 Savage, and very small variations in design and size and position and rake make huge differences with windshields, as does your size and how you sit on the bike.

Then you get into what is excessive wind buffetting; what one finds excessive another may find to be completely acceptable.  Even for the same person, what is acceptable will vary as to what they are doing; hence National Cycle's Switchblades -- four quickchange windscreens for a single mounting.

SaintLouisSavage liked the look of the Flyscreen, as do I, and was curious as to whether or not it actually had ANY function.  It does.  The Flyscreen is OBVIOUSLY not going to do much to keep the wind off your face.  But it is a functional windscreen in that it does reduce the wind pressure on the body.  You get the wind in the face / bugs in the teeth ride of no windscreen without the wind pushing you off the bike at high speeds.