I have the Madstad bracket and I was running with the Givi for a while. Have since removed it and put the stock one back on at the lowest, tilted back, which effectively is me running without any windscreen at all. I must say that the air is "cleaner", no turbulence at all, but you don't get any protection from bugs ( not a problem here at the moment ). Once the insects start getting worse, I may go back, but I do like the cleaner air without the windscreen.
Toys : 2009 Versys ( Blue ), 2006 Mazda MX-5 Miata
Needs : 2016 Mazda CX-5 ( RIP Mazda5 ), 2007 Honda Civic