If you're into the blues, at some point you will become interested in blues history. At that point, you will wish that you had this album. So you might as well just get it now.
Johnson does some great solo guitar work and it definitely stands up to the test of time. There's just too much good stuff on this album. "Crossroads"? Got that! "Love in Vain"? Yep! "Walking Blues"? You bet! That's why they call it the COMPLETE recordings.
The only two drawbacks that I see are (1) his voice can be a little whiney sometimes, and (2) duplicated recordings of the same song played back to back are sometimes interesting for the contrast between versions, but sometimes tiresome.
Robert Johnson's major flaw as a bluesman -- he had no nickname!