Conditions: 14-16 knots with swell. I did not like the angle of the pulley that comes on the sleeve so I kept the old pulley that was on the clew. Unfortunately when the pulley that comes with the device is not used, the clew hook does not stay in place risking grommet slipping off. It states on the package that the outhaul line must be on the starboard side. I have been sailing with it on port for 4 years, as I like to have the Cunningham on starboard for easy access when rounding upwind marks. One must follow instructions because when the outhaul line is on the port side of the boom, when sailing on a starboard tack there is a conflict with foot of the sail. I will try variations tomorrow. (I wish they sold two hooks in every package, one for a port outhaul line system and one for starboard). The sleeve really slides on the boom like butter. It was windy today, so I will sail tomorrow earlier in the day for lighter wind, and test it again. I have a feeling the sleeve will become a part of my boom.