We had the UK version, called the Lazy Mate or something like that, and loved it. On our 38 the routine of tying down the sail with sail ties and then getting out the sail cover and snapping it in place around all the lazy jacks got to be quite a pain - almost enough to make me envy those folks with in the mast furling mains. But with the UK set up all you did was run a zipper the length of the main cover, no ties to deal with, and nothing to fall off or get lost.