Yeah my milage varied a lot. Jetfins are one the most akward fins I have found for the back kick. Don't get me wrong, I love my jets, but for the back kick they are not that flash at all IMHO.StSomewhere:Maybe you can do those kicks with paddle fins. I have a pair of Cressi fins that are pretty much worthless at the backward kick (by worthless I mean I go backwards on the powerstroke and forwards on the loadstroke because they are so prone to bending). The Jetfins are much better. IMO. YMMV.
The aqualung blade 2's and Mares quattro's are far superior for the back kick.