The very 1st board I ever rode was the 2005 crazy fly. It was super felxy! I'm cueently riding the 2007 127 x 40 crazy fly pro. The board still has a fair bit of flex but is no where near as flexy as the old boards. I find the "07 crazy fly to be very responsive with heaps of kick off the water once you learn to time the pop.
I love this board when fully lit, holds down heaps of power and allows me to land big old school jumps without too much stress on the knees. ride it both on the flat and in waves, and i like it in both, I have not experienced the "flex out" or "buck off" described by sir rowdy. I can't however do "half arsed 3s or 5s" and prefer to try and ride my surfboard in waves, just not good at it yet!
if you are interested i'm selling my 130 crazy fly, hardly ridden,
www.seabreeze.com.au/Members/Classifieds/Item.aspx?id=deb5fad1-8e25-4f14-8944-79fc0979b596 just PM me if you want some pics. sorry for the blatant pimp

I'm keeping the 127 and stand by my review. I really love riding these boards and reckon they rock, especiallly for flat water riding with heaps of wind.