Review of RY4 Flavor-FA:

If you're looking to recreate that original Dekang RY4 you'll be dissapointed, but on the bright side it mixes well with tobacco or other darker flavors. To me it lacks the sweet tobacco undertone of a classic ry4 but it retains the vanilla and caramel notes. It's a bit of a complex flavor and everyone has their opinion on what it is but besides caramel and vanilla I detect some mild floral notes with a hint of toffee or butterscotch. It's definitely worth trying, it's not too difficult to make a great adv with this as the base with a little experimenting.