I'm getting used to it. The details and nuance are all there but it's hard to pick it out. However, once you get used to 'feeling' (ugh) the bass as opposed to hearing it the midrange really jumps out at you. So what I'm saying is, you won't like it immediately if you're looking for an audiophile signature but it WILL grow on you.
The soundstage disparities are very interesting: I've noticed that instruments when PLACED in certain positions on the stereoscape really do expand your world (In the Air tonight - Phil Collins; Pink Matter - Frank Ocean (ft. Andre 3000)), however reverb -which creates the 'room' in which the instruments reside- is slightly constricted. I don't know why this is (and I don't want to speculate), but I notice it on a number of songs, especially Interlude 1 by Alt-J. So what happens is some instruments almost seem like they're outside of the room, I don't notice this effect unless I'm REALLY concentrating, and to be honest, the good instrument separation on the M-100s is why I notice it in the first place. This slightly alien effect doesn't really seem to hinder electronic music at all, which is not really surprising if you've heard electronic music on the M-100s ;).