I've tried TFA, German Flavors, and Jungle. Although all 3 of them offer decent woodruffs I preferred the one from Jungle. I
vape it almost every day in a
juice I called Winterfell. Horehound, Woodruff, Koolada.....and something else.
Now, to be fair Jungle Flavors Sweet Woodruff was the first one I tried and immediately liked, and worked with, and a few months later I tried the other two, but was already using Jungle. If I had tried all
three at once I would have still probably chosen Jungle, but with good possibilities for German Flavors, and lastly TFA.
But at this point it is personal taste, not quality.