While not the first band to perform all-acoustic (Tesla did that) and not the first rock band to be backed by a symphony orchestra (Moody Blues did that), KISS has proven once again that they are not afraid to take chances and to go beyond the misconception that they are a novelty act or a glam band. These guys have sold more records than any other artist with the exception of the Beatles (from whom they admit they got their sound from), Rolling Stones, Elvis and the Grateful Dead. Out of them, only the Stones are still actively recording and touring. The rest have settled for repackaged hits, when surely they could have done better.
KISS does do better here, taking the hint from Metallica's S&M album, and from their own "Unplugged" album, where they had a small orchestra back them on a few tracks.
Bottom line: You Wanted The Best, You Got The Best. While not always the first to do things, they do it in the most memorable way. Just when you think that you have nothing to look forward to except a "Last KISS", the boys in leather and greasepaint come back to surpirse even their most hardcore fans. After all, who'da thunk it that "Rock and Roll All Night" would have an orchestral backing?