Hi, I bought a O43 this week, lying in Croatia. Anyone that has read any boat reviews. Can't find any detailed test on the net except this one (in croatian):
I also found this more general article:
There is at least 3 reviews most in french and english: Voile magazine, Bateaux et Yachting world ou monthly in 2007 and 2008.
I have one it is a great boat for the value. It needs minor improvements to become a blue water sailboat.