Good luck getting anything productive done outside of following their first-person shooter template. Good look importing your custom models using their plugin driven asset system. Good luck getting any answers on their dead message board or getting any relevant docs on their cryptic website filled with dead links.
Yes their real time GI is to play with but when you spend more time playing and marvelling at their beautiful demos over actually getting things to work right, that’s when you know you’re in Crytek hell.