I forgot to post my opinion of the 3 fin here like I said I would, whoops.

Gonna start with the negative to get it out of the way, I'd like to end it on a positive note because I do like the fin. It is not great for most swimming pools. Because of the big surface size and the fact that it's so soft, if your pool doesn't have a real deep-end as most pools don't anymore, this fin will actually suction to the bottom like a suction cup. I've been stopped dead in my tracks from this, although wearing a skin over it seems to solve this problem. Also because of the softness and flexibility, as well as the size, any propulsion you get from it is nearly cancelled out by the drag. I have a LITTLE more propulsion than if I were doing a dolphin kick without a monofin at all, but it's not much. (I tried the fantasea one fin before too, because it's so small and floppy it felt like swimming without a monofin entirely. Three is a little bit better in that regard.) Other nitpick is that when it came that the foot pockets were way too big for my feet, but a pair of thick neoprene socks solves this. I like that because I don't like swimming without the socks anyway, so I suppose it's kind of a positive?

Positives: I actually had a great experience with it swimming in the Florida springs. I'm not sure what the difference was, but I feel like I didn't tire as quickly while wearing it. I didn't feel I was swimming very fast, but I felt like I could swim for longer and stay under more comfortably. Probably because it's mildly negatively-buoyant, so I don't have the feeling of dragging something with me that's trying to float. It flows nicely with my legs. As a swimmer I tend to sink naturally, so having something attached to my feet that is about on the same density level of my body feels a little more natural I suppose. It is also a very pretty monofin, I kind of wish they'd use the mold for their Spellbound tails.

I saw someone make a comment about mermaids looking more graceful and elegant when they swim slower, which isn't wrong. I'm also the kind of person that prioritizes looking good over speed, so the negatives about the fin aren't a dealbreaker for me. I actually do like the fantasea 3.

I also like it a lot better than the Finis Shooter if that says anything for anybody.