This game is fantastic, one of the more fun and engaging games I have played in a long time.
I try not to play it so much these days, it has a real knack of absorbing all your spare time trying to optimise your factory, whilst trying to expand. Every little tiny action inevitably leads to a 'just one more thing ...' (which of course leads to another thing). It's really rewarding, up until you get to a point, where you may find yourself looking for a bit more content, or a slightly better balance, or a better endgame.
Still stands up as a 'toy' though (if you like to continue with your optimising of the factory) - even after you hit the point where you may have 'completed' what there is (or you just start again, and try different starting conditions, or self-imposed challenges, or whatever, make a railroad etc.) - development progress also moves steadily and positively towards the game that this thing promises to eventually be.
