You can't really class it as a concert performance, any more than Chicago is a concert performance. Its fully costumed, fully choreographed, there are trucks coming on and off, drops and projections, and several tiers of walkways above the orchestra for characters to move above on. It works very well, and avoids the original production's Napier set.... Whilst impressive, any production that puts a piece of painted machinery at the heart of the performance, as opposed to the performances, score and book, has a big problem. The original set, and its (sometimes) levitating ability, came from Nunn's want to do split-screen on stage..... confusing the medium with screen. The new production puts the story at the heart.