I couldn't have been more wrong. It was brilliantly good fun, both true to the original and wildly original in itself, and I cannot remember the last time I laughed so constantly at a play - my face ached as we left, and we spent our walk through town smiling broadly and exchanging quotes and chortling happily. If that makes us sound like a bunch of idiots, that can't be helped. Not everything quite worked out - the music, or at least some of the singing, was, um, variable - but there was that feeling that this production got to the heart of what the play is about. I've seen attempts at the madness and mayhem before, but not truly realised what they were at, and probably just sat through those sections waiting for them to end.
It's only on for another week - go see, and do your own chortling.