After driving around with these harness lines in the kit bag for a month, I finally used them today with my Duotone Slick 6.5 at Esso Beach, Langstone Harbour. The wind was a gusty NE'ly with some big shifts, it was solid in the gusts, but lousy in the lulls. All of my concerns about using a harness were unfounded, easy to hook in and out, no catapults or issues gybing. Adjustable whilst on the fly without having to come off the foil. Best off all, extra upwind performance a real bonus!!