At last I had the chance of testing the 15m FS Soul and wow!
This kite is amizing! Is just in another league!
I have ridden it extensively in foil and twin tip and this kote is STABLE as no other foil kite I have ever ridden, even totally mistimed jumps can't collapse it, just floats with you waiting for the next attempt, while any other foil kite gonna say to you GAME OVER folding or bowtieing.
And that doesen't implies any trade in performance, it boasts to the moon. Especially noticeable with the twin tip. Maybe I still need to get the right timing with the foil.
Totally recomended.