RE: Mary Poppins - I saw the Broadway production a couple of weeks ago, and liked it. I didn't love it, but I liked it. The "Jolly Holiday" number is better scene from "the front", rather than from someone illegal bootleg copy from a cheap(er) balcony seat. I think the only real quibble I had was with the "Feed the Birds" sequence - I was hoping for a more imaginative treatment. -Oh, and then there was the "Temper, Temper". But again, I liked the production a lot.
And that "Supercalifragilisticexpialidocious" number truly is amazing. *A friend of mine is a "swing" in the show, and I truly don't her - she had to learn eight different tracks for that number alone. That's a LOT of hand movements!