I've been playing for a few hours so far, and have been enjoying every minute of it.
No crashes to report and no bugs yet, but more of an observation.
Performance seems to be quite poor...I would say sub 20 frames per second, and the game seems to be stuck on the "Very Low" graphics option.
Changing my graphics settings seems to make no change to the overall appearance of the game, or indeed the performance.
Spec is quite modest:
2GB GTX 660 Superclocked (EVGA)
16Gb DDR3 RAM
But would expect to be able to play on Medium settings at around 30 fps
Understand game optimisation isn't a priority at the moment, but if there is something I am missing regarding altering the settings it would be handy to know