Hi Doug,
Games take about an hour, depending on the scenario - but I'd say that's the usual.
At the moment, we're happy with the scenarios from the game - we've done a couple of scenarios ourselves, and will probably do more of that as time goes by. Certainly if we follow our habits from Battle Cry and Memoir '44
I hear you on the hills though, I may have suggested we cut them in half myself that day!
Cheers
Donogh