RY4 from Dekang has always been my favorite, sweet and smooth caramel flavor, it's all I've smoked for over a year. Now that Dekang has changed their recipe, it's now the worst flavor I've ever tasted. Health Cabin's RY4 is decent, but still a different flavor. If anyone knows of something comparable to Dekangs original, please let me know. I'm down to my last few drops!