Originally I ordered two Sport in Space Grey. At 3:08am the ship time was 4-6 weeks (in Canada).
Went to the store on open and I tried on: Sport Space Grey, SS Milanese, SS Black Leather and SS Classic Buckle (because it was still showing launch availability). My wife tried on all the same.
I liked the SS much better than the Space Grey. The Space Grey is cool, but more casual and "Casio 80s". The SS seemed a little more upscale.
The Milanese loop felt gorgeous and airy on the wrist. But metal bands and MacBooks don't get on so well and I'm a writer. The Black Leather was lightweight, soft and scratch free (on the MacBook), but the delivery date by then was June.
The Classic Buckle felt much nicer than I expected. The leather feels terrific, the buckle is a nice slim affair, and the look is pure class with the SS bars.
So since the Classic Buckle was still available for launch, I ordered two of those instead and cancelled the Space Grey. I also ordered rubber straps for the gym.