Hey Ivan, glad to see you're going to give a mono a shot!
I have the medium, which I like. I think it's a good all round fin, but think that possibly a softer blade would be better.
I have it seen it recommended that a diver do some training with a stiff fin, but actually dive (even competitively) with a soft fin.
I find that the medium feels a bit stiff for descents, but great for ascents. That said, even a soft fin will move so much water that it should be ok coming up. Eric used a big stiff fin for all his stuff (so far), but he's a bit of a freak compared to the rest of us
Cheers,
Erik Y. (just a bit North of you)
