I've seen it a couple of times, once with my school the year it started (but the coach driver got lost in London and we basically missed the Circle of Life opening performance
) and again a few years back (with a different coach company that actually got us there in time). It was absolutely amazing both times! Although the second time around they didn't play the Morning Report sadly.
I just wish they'd release a soundtrack for the London Broadway. When we spoke to the lady selling merchandise there, she said that they've never released one for us since they can just sell the New York recording.