I had a pair of MKS FD-6 pedals on my Bike Friday Season Tikit. They are slick in general and very slick when it's raining and the bearings on the left pedal died quite quick (about a year and a half of use after being repacked last season). So I'd steer away from them. Frankly I realized I don't use the folding mechanism on my pedals much at all so I decided to put on a pair of full on MKS touring pedals due to large wide feet. They've been great so far.
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2009 Bike Friday Season Tikit (commuting folder)
2007 Rivendell Atlantis (touring, general riding, errand runner, stuff hauler)
2007 IRO Mark V (SS)
2006 Rockhopper Comp Disc (Icebike)