I saw saw Sweeney Todd last week at the Princess of Wales Theatre.
It was quite an interesting show. It was re-worked so that the actors in the play both played the musical score, acted, and sang.
How they came up withe required number of people in the world who have enough talent to do all this incredibly well is beyond me.
I had never heard of the play before but by chance read a review of it in the Globe and Mail where the reviewer was saying "whatever you do, don't miss this one" He was right. A brilliant show. Stand outs for me were Edmund Bagnell who played Tobias (and the violin, and the obo, and the clarinet) and sang and had this maniac expression on his face even when just in the background.
Also Judy Kaye who played Mrs. Lovett to a T. She was brilliant as well.
Here's a review of this re-thunk Sweeney Todd.
If the travelling show comes to your town, I'd recommend you check it out...
http://www.eye.net/arts/theatre/article/9148