Interesting find, thanks for posting. Did you check out any of the jazz, funk or afrobeat tracks, there is a variety of musical styles to choose from?
Just gave a quick listen to a few minutes from three of the GD tracks on the guys youtube channel. They seem like they would be fun, and have the most value, for lead guitarists or soloists in general. I didn't get far enough to comment on how accurate the chords are but the comments for Eyes of the World indicate that the chord sequence during the guitar solos is not 100% accurate. The music itself sounds nice but is kind of generic with none of the rhythmic idiosyncrasies that define the Dead's music. They appear to be free so this is certainly a nice resource for those that want to play/sing along and get their Jerry on.
To me a lot of what makes the Dead's music is the unique styles of the musicians themselves and you are not going to find that here. The backing tracks would be a good entry point for some players, once they have the basics of the songs down they could go back to the original recordings to try and learn the style if so inclined but for something to solo and practice over they seem more than adequate. I am going to check out the afrobeat tracks since I have been on an African music listening binge lately.
