Let's see... http://www.youtube.com/watch?v=nMjy8Mp5MmA
6:25 ... longsword.
Ok, on a serious note.http://www.youtube.com/watch?v=YrgFNjucqyI
52 I try against John.
2:35 I try it offensively.
2:45 I try against John.
3:19 John tries offensively
3:32 sorta. It's more like an afterthought.
John defeats a bunch of attempts after that.http://www.youtube.com/watch?v=FeGLLSkhEJo
44 I try against Robert from the Chicago group.http://www.youtube.com/watch?v=-n7oibkzhes
22 seconds with rapier and daggerhttp://www.youtube.com/watch?v=HtvXavEiHJ0
Randy gives it a try at 47 seconds against me.http://www.youtube.com/watch?v=Ft7BjCzZp5o
I try against Randy at 2:34.http://www.youtube.com/watch?v=vOvLZZ69nA4
1:18 I try against John.
1:46 John tries against me.
2:57 I try a void on John.http://www.youtube.com/watch?v=gwmsZeuhi9s
1:14 I try against Randy.
High School Kidshttp://www.youtube.com/watch?v=0uZBoLPGcIU
4:45 I pull one off against a student.
If I dig around I think we have more at varying levels of success.
I think at 19 seconds.http://www.youtube.com/watch?v=mUD39Tq-ric
Phil from our cousin group La Fratelanza tries at 3:10.
My personal opinion
They work great! You go off line and you stab someone and if they are moving toward you, they provide some of the energy in the thrust. Not that it takes much to stab something as noted earlier.
Here are some drawbacks. If they see it coming they can do it back to you. I'll try to inquartata, John notes a 'tell' I have, and he feints, then inquartatas himself. I run onto his blade with much gusto. (Yes, yes, I try to not have a 'tell' or fake it.)
If the opponent is shy, you need to go get them and it's not as effective. I'm much happier when they stab, I void, and they get hit.