Ok so here's my .02..........
I've been diving since 1970, used about everything out there and everything that's come along.
Old US Diver heavy ass Rockets while in the Navy, to some nice in my opinion ScubaPro Split Fins Max.
I bought Force Fin Pros and have never put on anything else......... UNTIL
While visiting Key West, I had the chance to dive the Vandeburg, using rental gear. The shop owner at Dive Key West handed me a set of these Seawings and said the Rep had dropped them off and he wanted my thoughts on them.
Upon putting them on, I felt again like a Penguin getting into position to enter the water. (I can move much easier in my ForceFins making this effort).
On entering the water, we encountered a very strong current, strong enough to move my mask if I turned my head side ways to it.
They provided good thrust but far below what my FF TanDeltas do. I was exhausted when I finally was able to board the boat after the 90ft dive.
I'll stick with my Goofy looking Force Fins, even though the SeaWing is 1/3 to 1/2 the cost.
Those PJs and the Seals don't use them to just look pretty!