I have to say that I really enjoyed it when I saw it (the day after it opened, got much better reviews than I expected, and I happened to be in NYC). That said, I never bought the cast recording and I never had any interest in seeing it again, so I must have realized deep down that a huge portion of my enjoyment was probably due to the the cast's energy levels, probably amped by getting much better reviews than anyone expected.
I also felt that the show had no competition that season for regular theatre goers, i.e., not most of the people on this board), who wanted to see something new, fairly 'traditional', and reasonably well reviewed. That left out Fela, American Idiot and The Addams Family, which had good audiences until I guess Nathan Lane left (but which was terrible and got terrible reviews).
My conclusion: it was enjoyable, energetic, forgettable, and lucky that it ran for three years.
PS -- I tried to watch the taped performance and turned it off pretty quickly (maybe half hour in) because Chad Kimball's performance had evolved to the point where he seemed to be channeling Leonardo DiCaprio's Howard Hughes, during his most extreme phase, and I just couldn't sit through it.