I'm new to the game but finished the campaign which requires a train setup (some of the work is already in place which helps a lot!). It was a bit fiddly to get it working but not really any more difficult than the true train sim games and a basic single line with a loop at each end worked perfectly...

I only noticed Factorio because someone mentioned it (Jens Bergensten a Minecraft dev) on Twitter. I downloaded the demo and thought I'd give it a go. An hour or so later I'd bought the game (Thursday) and I just finished the Basic campaign on Normal. I absolutely love this type of game and this one...