Yes, I've had an abiding interest sin the ACW since the 'Stonewall' game in an early S&T issue (the first game in what has grown into the GBACW series). That set me off into a voyage of discovery and over the year I've read a huge number of books on the subject and played a lot of ACW game, both mini's and board. Its actually not just the war period, but also the whole social changes that were taking place in America before, during, and after the war.
Interesting to note that there is quite a large body of interest in the US about the ECW as well, and I gather that there are some regiments of the Sealed Knot based in the US.
As for the game in question - I like the scale for one thing, and the system has a fair bit of period flavour but is simple enough not to get bogged down in too much detail. I suspect its the sort of game that some hard-core ACW players may refer to as 'GBACW Lite' in the same way as they describe OST as 'ASL Lite' :-), although I accept that there is a difference in scale between the 2 systems.
And, the counter and maps are nice with the sample I've seen of the map looking very good. There is a sort of fascination for the actual battlefield in the same way as there is a fascination with the battlefield at Waterloo,
“O Lord God, let me not be disgraced in my old days.”
'We few, we happy few, we band of brothers'