I was fortunate enough to receive a free sample of RY4 with an order I placed a few weeks ago. To be honest, I had pretty much given up on RY4s and haven't ordered one in quite some time. I find many of them to be a little too "dessertlike" for my taste. I was pleasantly surprised by DV's RY4! The original RY4 was a blend of tobacco, caramel, and vanilla, and now, any variation on that theme with those base ingredients can be considered an RY4. The dominant flavor that I taste in DV's RY4 is caramel. I have had a life-long love affair with caramel, but I find most caramel e-liquids that I've tried to be overly sweet, or cloying. The caramel in RY4 is mellow, yet present -- just right in my book! I don't taste much vanilla, but if it is present, perhaps it is mellowing the caramel without adding to its sweetness. The tobacco flavor is also subtle, but rounds out the mix nicely, adding a nice slightly dry and earthy undertone to the caramel flavor. Overall, I give this flavor thumbs up, and I wish to thank Darth Vapers for including it in my order!