Saw him a few times with Hot Tuna, a fun group with their reworking of country blues standards, and the great Jack Casady on bass, but I always preferred his aooustic fingerpicking to his electric work. He's really got a handle on the Piedmont blues stuff from the likes of Rev. Gary Davis, Blind Boy Fuller etc. plus he's written some lovely acoustic songs, eg Genesis, Song For the North Star both off Quah, a mostly Jorma album with Tom Hobson, from the mid-70's. The live Hot Tuna album from that era is also good.