The game was exactly what I was looking for. A modern, single man counter, solitaire, small squad game. I put off because of the price but the more I looked around and realised this was likely my only option for that game I was looking for, I gave up and parted with the money.
Rules and Errata
As far as I know there's "living" rules on the Compass website (last I looked anyway). Errata seemed up to date and the designer was present and very active on BGG. I had no problem finding answers to my questions or if there wasn't one there, a reply was quick.
I haven't been back to BGG to check on these rules - but I was going through the rule book yesterday just to refresh my memory and I was very surprised at how everything came flooding back. I think I was ready to play in an hour - and I hadn't been at the game in several months and I've absorbed several other game systems in that time.
Replayability
It seems to be superb to me. The order card pull system, the initiative system, the dummy counters, the WIA card system all looks like it would provide plenty variation even if you played the same scenario over and over.
Campaign System
No. Currently there isn't. I haven't even thought about whether I could implement such a thing.