Liam - Yes, I have SINYC since 1977 as double LP, and got the CD(also double) few years ago... Musically is, ermmm..., average I can say.
That's too much political pamphletary album I think, not much to show John's music but his political ideas. On disc 2, we can hear him in a live show at Filmore East theatre plus Frank Zappa & Mothers Of Invention and I think that's OK as a live show, but that's not his best at all. Yoko's presence is remarkable, that made the work being rather weak. But we can feel the Lennon's R&R vein on some tracks as "NYC".