g1138 has apparently been drinking too much Koolaide!
Apollo Biofins are the best fins I own. Work well with Flutter, Sissors, or Frog kicks and in current (Coz) or just sculling around. They are heavy, made of solid thick rubber. The only issues, heavy, and my Tech buddies give me odd looks! :shocked2:
My next favorite is Mares Avanti Quattro Fins. They are a lightweight, durable, full paddle fin. They have very comfortable foot pockets, and are very stable regardless of how one kicks. They can be tiring compared to splits. One reason people do not feel splits work, there is less resistance and you don't feel like they are doing much.
I also own/dive Force Fins. They are not the Super Duper fin that the manufacture would have one believe. However they are light and work very well once you get used to them. I also have a pair of Manta Rays. Another lightweight paddle fin. None of my paddle fins can out perform my Biofins, they are simply the best I have used, and I have used a lot and mostly paddle style.
I put
spring straps on all my fins which the exception of the Force fins which will not work with other straps.
Find fins that are comfortable (comfortable foot pockets) and meet your weight requirements. Some do not like heavy fins. I love Biofins but wish they were a bit lighter for travel. This is the main reason I have been seeking alternatives, but I always go back to the Biofins! For used the Mares are hard to beat as $20 on Ebay is common, but $50-70 is likely the Average used price.