I had a chance to put the SNU from Dennis Key to the tough- test this past weekend on my FX-ONE. We did a 15 mile downwind race from Santa Cruz to Moss Landing. I sailed back Sunday and played the puffs along the beach where I had a chance to douse the chute about 50 times. It is the best one out of the three snuffer systems I've had on the boat so far. I feel like it was gentler on the sail, so I might get some more life out of the spi. It's light too--around 1#.