A masterpiece of addiction and late, late nights! Considering it's still in early access, in single player I've experienced no real issues, the odd crash here and there but that's pretty much expected. Game play is smooth and pretty well optimised. Modelling and texturing are awesome, the factories look great, they shake and shudder as well as belch out smoke, plus they sound spot on too. If you like your factory style games give this one a try - you won't regret it. Highly recommended!

Some months later:
Over time updates/fixes have been consistent and reliable improving game play with almost all of them. Still just as much fun but now with less glitches! : )