I finally got a pair today, so far I am enjoying the fit, and the sound is close enough to my P5s that I think I might be keeping these! The cable noise is a let down, but I found that if I have the cable running behind my head and tuck the excess away down my collar it is not so bad, and the fit remains tight. Also I found that these can take the same size Complys that I've used on my Monster Turbines (T 400 I think?)
Unlike my Shure SE215s that i'm returning tomorrow, I don't have any problems with fit and isolation, I did have to switch to the larger size plugs, and they stay put! The supposed "Tangle Free" cable B&W mention isn't as tangle free as they say, it can be a real chore getting these set up, but once they are in, I can enjoy my Daily commute!
So far the sound is nice, nothing too harsh, I never noticed any sibilance problems, lots of bass and great clarity, also lots of the warmness that I enjoy in the P5s. These are keepers and will probably be my go to phones for the next few years, I hope the cables last!
I'm not too sure about the case though, the plastic thing in the middle I suppose is for winding up the cord, but I don't have the knack to make it all fit properly.