My black 42's fit well enough. I'd like to get a pair of Grey/Green ones for less than formal occasions. I'll try the GG's in 41.
**Update** After wearing my 42 KSO's around the house a little, I've become concerned about the tighness of the mesh and fabric on the top of my feet and the amount of extra hook velcro on the side. My wife even noticed and said that it looked like they were ready to explode (I don't have fat, meaty feet, just wide with a tall instep). I think they will be going back also. I'll try the GG's later, but for now, it's back to nekkid feet.
On a secondary note: I'm also not to fond of the cut of the sole for the pinkie toe. My pinkie likes to hang out a little so the sole doesn't quite cover the entire bottom of my toe. The sole is cut to let your toes crowd together like they are in shoes. Since I don't wear shoes much, and when I do they are sized pretty wide, so my toes are spread a little more naturally (much to my wifes chagrin).