So far I've only tried the Serenity one time so far, and unfortunately for me the wind totally shut off. I really went out too late in the day, so the session amounted to just a run out and back in (I actually had to swim it in the last 50 yards). From my run out, the Serenity seemed to move well in light wind, but I ultimately found that it really doesn't work so well in an absence of wind. However, I learned an important lesson in the effort. My next attempt will be much earlier in the day where I can depend on the wind holding up. Also, I'll use a smaller sail (a 7.1 instead of an 8.3) to initially get a better handle on things.