I just finished a 7 day, 14 hour render. I re-rendered my "confusion" image at more than double the size of the original so I could get it large enough to print for my portfolio i am working on. The original took a bit over a day and a half, and the findd ended up being a day and a half (rendering to disk).I was rendering premium at 64rpp with DOF and blurry reflections, with TONS of volumetric lights. Shadows were also disabled! I don't even wanna know the render time if i had left shadows on....seesh.