I too have been wearing the NB1123 since they came out, and had hoped for some change in color options. I had high expectations to finally own a pair of black sneakers.

Been wearing the same model shoe since it came out. I bought two pair of black and one white M1540's in the same size I had been wearing, and one pair in black a half size larger due to comments about them being a tad smaller/tighter. Indeed they are, in black, white still fits exactly the same.

The 12 6E I had been wearing was tight on the two M1540's. I got the 12.5 and that felt at least a full size larger and was a sloppy fit, even with an extra set of insoles.

I did notice there seems to be excess material designed into the toe box area on every pair of the 1154's I have seen which causes some bunching up of the area around the bottom of the laces. They arrived that way, and stay that way after the laces are tightened. I did not have that on any of the previous M1123's I had owned.

I just received the white M1540 today. It almost fits like the old 1123 this shoe replaced, though not quite as comfortable.