This is a really important track--probably worth a sample to hear the difference between the style of Sun Elvis and RCA Elvis. I've always questioned the quality of a lot of his RCA material (not to mention the movie stuff!). Compare this to "Teddy Bear" to see what I mean. Compare "Teddy Bear" to Chuck Berry's songs. Yes, there were some good songs, yes he made them all seem pretty good with his fantastic voice and style. But what if he sang better material more of the time?
