The guitar on the song is played in a very unique style. Jimi frets the roots of chords with his thumb, and then elaborates on them. It often involves shifts of quartile to tertian harmony and vice versa. In theory it is quite similar to the jazz style of chord melody.
The song is particularly revered among guitar players. Tom Morello wrote in this 2011 tribute to Hendrix in Rolling Stone
: "It's just this gorgeous song that, as a guitar player, you can study your whole life and not get down, never get inside it the way that he does. He seamlessly weaves chords and single-note runs together and uses chord voicings that don't appear in any music books."
Ken - Tigard, OR