I have a pair of split fins currently, they are amazing. lots of hate about them. to take away control, you get more speed.
splits are good for surface swim and i dont have a problem with them at depth.... I can seem to control myself pretty well at depth.
i recently started learning to frog kick and I have to give up my splitties, tried doing some frog kicks on a dive with turtle fins, i found i had way more control, i could spin around easier, remain still with very minor leg movements and be able to adjust position quicker.
I have both, but I'm not really sure which is better. I know that in timed pool swims, I'm faster in splits. That part I have experienced myself numerous times. I know splits "feel" weird when doing helo turns and frog kicks, but at least for me, they still work. I know if I want a better leg workout I wear paddles. I know some of the tech type loves their paddles.
Does anyone have any empirical data on the whole black mask versus clear mask debate?