This is one of the best 3.6 sail ever tried, why? is soft, soft feeling, top range of use, excellent stability, and is fast and really light in the hands. The mast was 340 Gorilla, I settled my board in twin fin mode 15.5-15.5, usually I use my ultrakode in three fins mode, but in B&J conditions I prefer twinzer mode I don't need grip I prefer loose feeling. The wind was super strong.
Test conditions, spot Garda Lake
Have you used a blade 3.5 or 3.7 in similar conditions and if so how would you compare them to the s1pro?
I own an S1 pro 2017 3.6 and absolutely love it. It's light, soft and maneuverability is great.
Blades are more powerful and stable; usually heavier guys tend to like blades more due to availability of power and stability... when lighter ones enjoy the S1 light handedness and maneuverability in the wave.