I stopped at Whole Foods today and tried this:
Brand: Zevia Cola.
Origin: Los Angeles, CA.
Purchase Place: Whole Foods, St. Paul, MN.
Sweetener: Stevia Leaf Extract.
Review: This wasn't great. It wasn't horrible, but I didn't care for it. The cola flavor was weak, and it was really "thin" like many diet sodas. It had a strange sharpness (that I think I get a lot from Stevia), but then a decent slightly fruity kick. Not great overall.
Score: 4.5 out of 10.