It made all the difference today, I did my PB for the Nautical Mile, that's nearly 2 km, where the sail coped with wild gusts, and lulls of wind, it's why I managed 32.872 knots, check it:http://gpsteamchallenge.com.au/showsession.php?date=2007-12-05&team=2
AS the say in the windsurf mags = Highly Recommended!!!!!!