I love musicals (though sometimes not fully understand what the performers are singing) and have seen quite a few so far. I personally think the best is 'Cats', which I had seen in Broadway, New York city. A lot of people say that Broadway shows are in parallel with London musicals. I haven't seen 'Cats' in London so can't really compared. But the one I've seen in NYC is really excellent!!! Tickets are expensive, but there are ticket booths (similar to those in Leicester Square, London) where you can get some cheap ones, at half the original price. Can't remember where the ticket booths are since it was about a year ago (is it Times Square??). But I remember the ticket was $40 (original price $80), and it was a fifth row seat. Queues for the cheap tickets were horribly long.
The stage was not as big as I imagined but the setting was excellent, so as the make-up and costumes. The story is not as good as Les Miserables or Phantom of the Opera but the show is very lively and entertaining with lots of dances and great songs. My favorite song from this show is 'Memory', a great great song!!! Throughout the show 'cats' were running around the whole theatre. They don't just stay on the stage. They were very very 'cat-like'. I remember especially the girl who played a siamese cat, so willowy and graceful. It was a great musical and I will definitely see it again, but not in NYC. I'll see it in London, just to have a comparison of whether Broadway shows are better, or London's.