I'm really, really hoping that I wind up loving CMBN. But having toyed around with the CMSF demo for about a week now.... I'm worried. I really dislike a lot about CMSF. The controls are not intuitive and many cannot be remapped (can't map camera movement to the arrow keys, for example). Seeing which units are or are not in command is exceedingly difficult. I'm not sure why this was changed when CMx1 did it so well (red line = in command; black line = out of command). Trying to figure out where a unit's commander is (or where his commander's commander is) is frustrating and takes way too much time and effort. Additionally, I find the graphics much improved in CMSF, but have a very difficult time seeing changes in the terrain and judging if a position is blocked, hull down, or totally exposed. The colors of the movement orders are so light they're difficult to see, and clicking on them often ends up deselecting the unit rather than selecting the movement order.
I hope some of this stuff has been addressed in CMBN, otherwise I may end up not liking this game as much as I was anticipating.