https://www.facebook.com/notes/mark-vanderwerf/wills-wing-falcon-iv-tandem-review/1095417273809710

The primary complaint I've heard over the years from other pilots
about the Falcon III Tandem is it's heavy handedness... large amount of effort
in both pitch and roll control needed to fly the glider. The Falcon IV has
noticeably lighter pitch and roll. It also has a noticeably larger speed range.
It likes to fly slower and maintains easy roll control at low speeds. It also
accelerates and maintains higher speeds better. The main thing I'm stoked on
about the new Falcon IV Tandem is the flair window. The Falcon III had been my
choice over other tandem wings for quite sometime due to the large flair window
and predictable flair characteristics. The new Falcon IV with it's greater baton
density has an even larger flair window with a noticeably softer/ easier push
back from the control frame.