B13.... I observed an AXIALIF fusion many months ago and have some clients with them. It's a very interesting surgery and it's creating a bit of hype because it's fast and (hopefully) recovery time is faster without the more invasive procedures involved with more traditional fusion. I wrote about it here:
http://www.ispine.org/forum/showthread.php?t=532
One does need to ask the question.... "if there is a problem, how do you revise it?"
All the best....
Mark