There are several museums that are fairly similar or overlap in content matter and style. The Rock n Soul Museum and Stax are similar, but just different enough that both are worth your time.
While Stax (reviewed separately) is very in-depth about the Stax music company and its history/stars, Rock n’ Soul is a little more general.
Like most museums, it starts with Africa and chattel slavery as a basis of hymns and the blues. It then transitions to early pioneers, such as Robert Johnson. Then the rest of the fairly short visit peppers in small flakes of Elvis, Isaac Hayes (a Stax artist), some blues artists (many of which were featured at the Blues Hall of Fame, another museum I’ll review).
I think the main sell here is the audio tour, rather than just reading and viewing the exhibits. I didn’t take the audio tour, but I saw several people doing so, and many were dancing and singing along.
This museum looks huge from the outside, but is fairly succinct and small, but the content is good. Depending on how much you want to absorb, 1-2 hours is probably adequate. Visually appealing, nice staff. I parked at the Hyatt garage for 10 dollars.
Worth a stop, and again I recommend both this museum and the Stax museum, and even the tiny Blues Hall of Fame, but if I had to choose, I would go with Stax (reviewed separately).