they offer a wider support. some people feel that their foot is rolling off the side of the pedal with spd's so prefer the wider support of a road cleat. personally i don't have that problem so am happy to forgo the disco slippers for now. don't forget the pedals are single sided so maybe not as easy to get into.
i have changed my mind since then. i love disco slippers.
i have changed my mind since then. i love disco slippers.