For those looking for a great freediving class check this review (yes, I took the course). I saw a thread for PFI so I figured I'd put up some of their competition. :) Martin Stepanek is the coach... nuff said. Probably the most skilled Freediver that ever lived. HE is the Tiger Woods of Freediving bar-none.

http://www.spearboard.com//showthread.php?t=49013