YES - it is the early stuff and is very, very tasty. From there, it generally becomes more "rock-oriented", whatever that means I have an EMI set (may be out of print) that collects the "Shelter" recordings. Sure, it is not PURE blues, but it is close enough for me and Freddie is all there, vocals and playing-wise.
After the Rhino, it might be easier to just decide what to avoid, if anything.
Eric