To sum things up, the Sunny 16 rule explains that in bright sunlight conditions, as long as you stick to f/16 and match your shutterspeed to your film ISO, you should get a correct exposure. For example if you are shooting ISO 100 film you should set your shutterspeed 1/100s (or whatever closest possible setting, in most cases 1/125s), aperture to f/16 and you're good to go. The darker it gets, the more you open up your aperture.
The video I mentioned made me curious and since the weather was nice I loaded up a roll of Kodak Ektar 100 in my Mamiya RZ67 Pro II and headed out. I walked around the town where I live for about two hours, not once changing my settings. Blazing sunlight: 1/125s at f/16 and that was it. See, that's the thing - set it and forget it.
Even though the camera was a bit heavy to lug around, it was a very relaxing walk. Below you can see all 10 shots on the roll and exposure wise I think they came out pretty well.