Just bought the map yesterday, Im a very casual player, have loved flight sims since the 1980s but just dip in and out now and then.
Really enjoyed flying about the map, the seemless undulations were beautful and something that hit me for the first time in a flight sim.
My initial impression was that this is from WWII, the radar installations, steam trains, look of the buildings and roads.
But I am from the UK and the number of houses did come across as slightly off for a historial map, London was at its historical peak population just prior and the political dispersal of population into the South East had yet to happen.