In a self-deprecating poke at the rendition's extended length, it is listed as the "Who Do You Love Suite", with individually titled "movements" which give writing credits to the soloist on each segment.

The performance of Bo Diddley's composition breaks down into a guitar solo by Gary Duncan in a style somewhere between jazz and rock (described as "Bloomfield-like"[2]) with a walking bass line by Freiberg.

It then mellows down into some apparently improvised guitar and bass plucking and sliding, with feedback, handclapping and audience participation 'almost like a "found object" out of Dada.

(April 2001, Notes to Acadia CD "Copperhead")[3] The second side of the album contains "Mona", another Bo Diddley song, and two instrumental compositions by Duncan, "Maiden of the Cancer Moon" and "Calvary", all of which segue.

[citation needed] As a coda, the band performs the theme tune from Roy Rogers' western television show, which lends its title to the album.

While briefly remarking that all four songs on the second side are excellent, Greil Marcus devoted most of his review in Rolling Stone to extensive discussion of the side-long rendition of "Who Do You Love?

", which he deemed "one of the best rock and roll recordings to emerge from San Francisco, a performance that captures all the excitement and grandeur of the great days of the scene in a way that is almost too fine to be real."

He lauded both the atmospheric and technical accomplishments of the jamming, and said the band has "the uncanny ability to perform with a psychedelic looseness of spirit, without becoming boring or in the least bit pretentious.

"[4] The album was a surprise commercial success, hitting #27 on Billboard and eventually certified gold (over 500,000 copies sold in the US) in 1992 by the Recording Industry Association of America.

[10] Quicksilver Messenger Service Happy Trails was remastered and rereleased in audiophile versions of June 2012 (a “mini LP” on CD) and January 2013 (HQ vinyl).