Awesome article by the folks at Carmencita Film Lab:
What conclusions can be made from this test?
Well… first of all… 6 stops overexposed? And it still looks amazing? That’s pretty sweet. Overall, there seems to be a higher number of usable shots on the overexposure side than on the underexposure side. So what does this tell us? Film LOVES overexposure. Unlike what happens in digital photography, with overexposure film gets a little more saturated and you get more details on the shadows, but definitely no clipped highlights or “all-white” burnt images. That’s why it’s totally safe to say that if you’re in doubt between two possible camera values for your exposure you’ll always be safer on the “over” side than on the “under” one.
Like I’ve said multiple times here about shooting film: when in doubt, expose for the shadows and the highlights will take care of themselves.