Sadly, there were two TJB albums mixed for Quad and planned as CD-4 releases that never saw the light of day. They are the SPECTACULAR You Smile, the Song Begins and the above average Coney Island. Neither sold well. You Smile is long OOP and has never been released on CD to my knowledge. Many of its' tracks are available on the Lost Treasures CD compilation.
Yup, like most people I bought it for the cover picture and actually grew to really like the music. This is one of my favorite quads to listen to when I'm trying to do something at the same time. I'd give it an 8.
By 1970 the TJB sales were falling--fast and steady, though that only meant from the phenomenal peak of 1965-68 to modest sales from 1969-74. Why Herb hasn't reissued the entire TJB catalog is a mystery, since his core fans will buy any of those titles, and his solo work, too. And a mono TJB box--with the 45 hit versions included--would be manna for his fans, but not likely to happen, alas.
One of the iconic album covers of the '60s, and I would argue, in the same league as MEET THE BEATLES or THE DOORS, but not notorious as, say, the original ELECTRIC LADYLAND or BLIND FAITH covers. Still, fairly bold for 1965, and didn't hurt the commercial juggernaut that would become the TJB. Of course it was notably parodied by the (now) forgotten comedian Pat Cooper:
But of course today anyone who does upmixes can do a much better job than A&M did, and they had the original tapes! Most of that stuff should be 3-track at the least. Not really conducive to quad, but some of the later albums might have worked out better. They really should have picked albums the were workable in quad, like the '70s stuff.