Yuck! I realize that I'm very far from tasting every imitation Dr, but I feel confident in saying that RJ Corr's Dr. Rush is the worst Dr ever! Imagine taking a handful of grass and dirt and drinking it. The half Dr Pepper can rating that it has earned does no justice to how completely unpalatable it is. I also should note that this is the only imitation that I was not able to finish. WARNING: CONTAINS GINSENG.. blech!