I had a Flo male reverse last year and produce four seeds, two of which made it up, and are currently on their third set of leaves. I posted a question for DJ Short on this (link below), and mercifully he answered quickly before he had to go off again, but I still think there's more for discussion, as I'm still fairly clueless as to why they're so valuable, and why they virtually guaranteee against hermaphroditism in future generations - presumably when a male or female plant is used...?
http://www.icmag.com/ic/showthread.php?t=87460
http://www.icmag.com/ic/showthread.php?t=87460