I wanted to get this before this weekend's anniversary of the battle and. sure enough, it showed up today in the mail around the same time that Heth's men were skirmishing with federal cavalry outside Gettysburg.
With luck I'll get to try it out at least once before the sun sets on the third day anniversary.
My initial, out of the box impression is that it's much like his earlier Waterloo game, although perhaps a tad simpler.
I find Wallace's designs intriguing because, much like Bowen Simmons' games, they owe very little to the mainstream wargame hobby's conventions.