Using Substance Painter/Designer for CSGO

I've been trying out Substance Painter demo and was thinking about using it to texture my custom props for CSGO. Unlike the source engine, it uses a PBR shader as standard. I was wondering if anyone had any experience with using it for CSGO, and how you would set it up for use with the engine. What maps can you add to a texture or material for the source engine? It seems slightly more basic than the Unreal Engine. I was also thinking about giving Substance Designer a try to for making some custom textures. The latest maps in CSGO use hi-res textures, is there any guidelines on how and when to use them, do they have a significant effect on rendering or FPS?