I agree that you should try them in water for yourself because it is
kind of a personal thing. I was lucky enough
to be local to ScubaToys and Larry scrounged up about 8 different fins for
me to try. After about an hour in the pool, I picked the Apollo Bio-Fins.
For me, I equate the whole Split vs No split fin argument kind of like
comparing engines. Which is better a V8 or a turbo 4? Both have advantages
and disavantages. I noticed that the splits took a bit longer (maybe an extra kick or so)
to get up to speed, but once there, it seemed like alot less effort to maintain speed.
For me in the end I picked the Apollo splits because of comfort in the water.
Also, their size and shape seemed to make them easier to pack than some of the others
On the spring straps, one thing to consider is how the strap actually fits.
The straps that Apollo supplies IMHO could be better. The way they
are molded, the finger pull lays down against your heel and has a tendency
to rub on your achilles tendon. There is also a rough patch where the strap
contacts your heel. Good for gripping but if the strap rides up and
if you wear low cut booties it can rub you enough to actually break the skin.
This was a BIG issue for my wife. Wasn't an issue for me, since I had taller booties.
If you look at the spring straps - all makes/brands I've looked at - the finger
pull (if it has one) is perpendicular to the strap (as it should be in my opinion) and sticks
out away from your heel rather than laydown against it.
This not only makes it easier to grab for don/doff'ing the fins but it will never
rub against your heel.
Personally, while I didn't have any real issues with the standard straps,
I really like the spring straps. I think they feel better on my heel and are
slightly easier to don/doff than the original straps.
Again, I'd recommend trying them out first if you can.
--- bill