I bought a copy of this several days ago and have been playing it ever since. Very, very impressive work - the moment a faster train overtook me as I trundled up a 4-track section was fantastically immersive. One teeny thing I would like to see (and I know that 'improved graphics' is on the todo list) is a 'toning down' of the colours, which are a little too bright/colourful/computer-generated (IMO!) at the moment.
This really is an incredible achievement and I can only hope that enough people purchase a copy so that the phase 2 stage of development will go ahead as planned.